Chapter Summaries

Key Plot Points and Events

• Lan Tian attends Zhang Ji's funeral and receives the Treatise on Cold Damage and Miscellaneous Diseases.
• He decides to have the text transcribed onto paper and printed in Jiangling.
• Guan Yu invites Lan Tian to discuss two matters: opposing Cao Cao's usurpation of the throne and restoring trade with the Sun family.

Character Developments

• Lan Tian demonstrates his dedication to promoting education and medical advancements by accepting Zhang Ji's medical texts.
• Guan Yu shows his strategic thinking by inviting Lan Tian to discuss political matters.
• Xu Shu reveals his commitment to using the Yangtze Daily to influence public opinion against Cao Cao.

Significant Themes

• The power of education and knowledge in improving people's lives.
• The importance of public opinion in shaping political landscapes.
• The strategic value of maintaining alliances and opposing common enemies.

Character Interactions

• Lan Tian and Guan Yu discuss political strategies and share their insights on governance.
• Lan Tian and Xu Shu agree on the importance of using the Yangtze Daily to influence public opinion against Cao Cao.
• Lan Tian, Guan Yu, Xu Shu, and Ma Liang engage in a intellectual discourse on governance and economics.

Key Plot Points and Events

• Lan Tian visits Jiangling to resume trade with Jiangdong.
• Guan Yu, Lan Tian, and Advisor Xu discuss strategies against Cao Cao.
• Lan Tian suggests building warships in secret for Guan Yu's future northern expedition.
• Lan Ji and Guan Ping's children are introduced; Lan Ji shows off her staff techniques.

Character Developments

• Lan Tian demonstrates his political acumen and strategic thinking.
• Guan Yu shows confidence in his military prowess and plans for the future.
• Lan Ji displays her energetic and straightforward personality.

Significant Themes

• Alliances and strategic planning against Cao Cao.
• The importance of military preparation and deception.
• The impact of Lan Ji's presence on the dynamics of the Guan household.

Character Interactions

• Guan Yu and Lan Tian discuss military strategies and express mutual trust.
• Lan Ji interacts with Guan Ping's children, showing her lively and friendly nature.
• Guan Yu and Lan Tian discuss their children's upbringing and education.

Key Plot Points and Events

• Guan Yu meets Lan Ji and is impressed by his martial arts and horsemanship skills.
• Guan Yu offers to teach Lan Ji and treats him as his own son.
• Lan Ji successfully rides Guan Yu's famous horse, Red Hare, without any issues.

Character Developments

• Lan Ji demonstrates exceptional martial arts and horsemanship skills, showing great potential.
• Guan Yu shows affection and interest in teaching Lan Ji, highlighting his paternal side.

Significant Themes

• Bloodline Suppression: Guan Yu wonders if Lan Ji's ability to ride Red Hare is due to some kind of bloodline suppression.
• Mentorship: Guan Yu offers to teach Lan Ji, emphasizing the importance of guidance and learning.

Character Interactions

• Guan Yu and Lan Ji: Guan Yu is impressed by Lan Ji's skills and offers to teach him.
• Lan Tian and Guan Yu: Lan Tian entrusts Guan Yu with Lan Ji's education, showing trust in Guan Yu's abilities as a teacher.
• Lan Ji and Red Hare: Lan Ji successfully rides Red Hare, showcasing his horsemanship skills and taming the horse without any issues.

Key Plot Points and Events

• Lan Tian returns to Guangzhou City and plans to stir up trouble using Cao Cao's royal proclamation.
• He sends Song Chen (now Wu Yong) to Wei Territory to smuggle in newspapers and 'Impressions of Guangzhou', scout for talent, and spread rumors.
• Lan Tian reveals his long-term plan to have Liu Bei declare himself King, using public opinion to build momentum.

Character Developments

• Lan Tian demonstrates his far-sighted strategic thinking and manipulative skills.
• Song Chen (Wu Yong) shows dedication to his mission, despite its difficulty.
• Hu Ke expresses his loyalty and eagerness for adventure, volunteering for a dangerous mission.

Significant Themes

• Manipulation of public opinion for political gain.
• The struggle for power and influence in the Three Kingdoms period.
• The importance of reputation and legitimacy in ancient Chinese politics.

Character Interactions

• Lan Tian and Gao Shun discuss strategies and plans, with Gao Shun questioning Lan Tian's intentions.
• Lan Tian interacts with Song Chen and Hu Ke, assigning them crucial missions and showing concern for their well-being.
• Hu Ke and Lan Tian have a candid conversation about Hu Ke's personal life, revealing Hu Ke's dedication to his work.

Key Plot Points and Events

• Hu Ke departs for Jiangdong on a mission, leaving behind a secret letter for Shi Xie to rescue Shi Xun.
• Lan Tian tries to improve Lu Lingqi's appetite by cooking various dishes but fails.
• Lan Tian discovers soybeans at the market and decides to grow bean sprouts.
• Lan Tian prepares a meat broth and grows bean sprouts to create a dish for Lu Lingqi.

Character Developments

• Hu Ke shows determination and adaptability in his mission.
• Lan Tian demonstrates his resourcefulness and creativity in cooking.
• Lu Lingqi's pregnancy causes her to have a bland taste and poor appetite.

Significant Themes

• Resourcefulness and adaptability in the face of challenges (Lan Tian's cooking efforts).
• The importance of understanding one's surroundings to succeed (Hu Ke's mission).

Character Interactions

• Lan Tian and Hu Ke discuss Hu Ke's mission, with Lan Tian expressing concern for Hu Ke's marital status.
• Lan Tian and Lu Lingqi interact as Lan Tian tries to improve her appetite with various dishes.
• Lan Tian and Hua Tuo discuss the use of bean sprouts, with Hua Tuo recognizing their medicinal value.

Key Plot Points and Events

• Lan Tian threads silver needles with silk and chicken paste, stuffing bean sprouts (Phoenix Piercing Silver Sprouts).
• Hua Tuo observes and is impressed by Lan Tian's novel method.
• Lan Tian performs the Five Animal Frolics for Hua Tuo.
• The Phoenix Piercing Silver Sprouts are cooked and served, with Lu Lingqi enjoying both the dry-mixed and soup versions.
• Gao Yuan prefers the meat from the cauldron.
• Gao Shun arrives with urgent news.

Character Developments

• Lan Tian: Demonstrates his creativity and culinary skills, showing care for Lu Lingqi's health. He also expresses his commitment to promoting medical education.
• Hua Tuo: Impressed by Lan Tian's methods, he shares his plans for the Book of the Green Bag and discusses the potential of the Medical College with Lan Tian.
• Lu Lingqi: Regains her appetite after trying the Phoenix Piercing Silver Sprouts, showing improvement in her health.
• Gao Yuan: Reveals his preference for the meat over the stuffed sprouts, displaying his straightforward nature.

Significant Themes

• Creativity and innovation in cooking and medicine.
• The importance of health and well-being.
• The elevation of healers' status and medical education.

Character Interactions

• Lan Tian and Hua Tuo: Discuss medical education and Hua Tuo's Book of the Green Bag.
• Lan Tian and Lu Lingqi: Lan Tian shows affection and care for Lu Lingqi through his cooking.
• Lan Tian and Gao Yuan: They share a light-hearted moment over their food preferences.
• Gao Shun's arrival hints at an upcoming plot development or crisis.

Key Plot Points and Events

• Gao Shun informs Lan Tian about recent strangers in Guangzhou City, possibly spies.
• Lan Tian decides to use Shi Zhi to leak false information to the spies about Hu Ke.
• Jiangdong spies confirm Hu Ke's identity and report to Sun Quan.
• Sun Quan, worried about Cao Cao's potential retaliation, tries to improve relations with Guan Yu through trade.
• Hu Ke is arrested and imprisoned in Jiangdong for approaching Shi Xun, not for the Yangtze Daily.

Character Developments

• Lan Tian demonstrates his strategic thinking and control over information.
• Sun Quan shows his paranoia and concern about potential threats, especially after the Battle of Hefei.
• Hu Ke's actions inadvertently draw Sun Quan's attention.

Significant Themes

• Information control and manipulation.
• Paranoia and its consequences in leadership.
• The impact of war on political decisions.

Character Interactions

• Lan Tian and Gao Shun discuss the potential spy threat and decide on a course of action.
• Lan Tian, Lu Lingqi, and Hua Tuo discuss the possibility of training female doctors.
• Sun Quan receives reports from his spies and makes decisions based on his paranoia.

Key Plot Points and Events

• Sun Quan suffers a crushing defeat in Jiao Province, losing significant resources and facing humiliation from Lan Tian and Shi Xie.
• Hu Ke, a spy for Shi Xie, is imprisoned and beaten in Jiangdong.
• Sun Quan discovers Hu Ke's true identity and considers executing him but is advised by Zhang Zhao to try and turn him into a spy for Jiangdong instead.

Character Developments

• Sun Quan: Struggles with his anger and desire for revenge but ultimately considers a more strategic approach to gain an advantage over Shi Xie and Lan Tian.
• Hu Ke: Maintains his composure and loyalty to Shi Xie despite being imprisoned and tortured. He shows intelligence and cunning in his interactions with Sun Quan.
• Zhang Zhao: Demonstrates wisdom and strategic thinking by advising Sun Quan to turn Hu Ke instead of executing him.

Significant Themes

• Strategic alliances and betrayals: Characters use alliances and betrayals to gain power and advantage, reflecting the complex political landscape of the Three Kingdoms period.
• Loyalty: Characters grapple with the concept of loyalty, with Hu Ke remaining loyal to Shi Xie despite the potential benefits of switching allegiances.

Character Interactions

• Sun Quan and Hu Ke: Their tense and strategic interaction reveals both characters' intelligence and determination, with Sun Quan attempting to persuade Hu Ke to switch allegiances, and Hu Ke maintaining his loyalty to Shi Xie.
• Sun Quan and Zhang Zhao: Zhang Zhao's advice influences Sun Quan's decision to try and turn Hu Ke instead of executing him, demonstrating their trust and strategic partnership.

Key Plot Points and Events

• Sun Quan visits Hu Ke (Yu Xiu) in prison, trying to persuade him to surrender.
• Hu Ke uses a strategy of "praising first and suppressing later" to gain Sun Quan's trust.
• Sun Quan sends spies to verify Hu Ke's background and learns about his loyalty to Shi Xie.
• Hu Ke requests that Sun Quan release Shi Xun, the Eldest Young Master, as a condition for his surrender.
• Sun Quan agrees, and Hu Ke formally surrenders, changing his name back to Yu Xiu (Zecheng).

Character Developments

• Hu Ke (Yu Xiu) demonstrates strategic thinking and loyalty, first to Shi Xie and later to Sun Quan.
• Sun Quan shows political acumen and patience in dealing with Hu Ke, eventually winning him over.
• Zhang Zhao, Sun Quan's strategist, remains frustrated with the failures of the Huaisi faction and seeks a path of retreat.

Significant Themes

• Loyalty and betrayal: Hu Ke's loyalty to Shi Xie and later to Sun Quan is a central theme.
• Trust and suspicion: Sun Quan's initial suspicion of Hu Ke and his eventual trust in him highlight the importance of establishing sincerity.
• Political maneuvering: Both Sun Quan and Hu Ke engage in political games to achieve their goals.

Character Interactions

• Sun Quan and Hu Ke: Their interactions show a power dynamic, with Sun Quan trying to persuade Hu Ke to surrender and Hu Ke using strategic language to gain Sun Quan's trust.
• Zhang Zhao and Hu Ke: Zhang Zhao is initially dismissive of Hu Ke but later admires his strategic thinking.
• Sun Quan and Zhang Zhao: They discuss Hu Ke's background and the situation in Jiao Province, with Sun Quan seeking Zhang Zhao's opinion on how to handle Hu Ke.

Key Plot Points and Events

• Lan Tian, known as the 'Dark Owl', has been quietly consolidating power in Jiao Province, posing a potential threat to Sun Quan's Jiangdong.
• Sun Quan's focus remains on the north and Jing Province, with no direct military threat from Lan Tian due to the mixed tribes of Baiyue inhabiting the land between Jiao Province and Jiangdong.
• Hu Ke, a former official of Shi Xie, arrives in Jiangdong and presents a plan to Sun Quan to rescue Sun Quan's son and gain influence in Jiao Province through Shi Xie's network.

Character Developments

• Sun Quan: Shows strategic thinking by considering long-term plans to reclaim Jiao Province from Lan Tian and Shi Xie's family.
• Hu Ke: Demonstrates loyalty and resourcefulness by offering a plan to Sun Quan and expressing a desire to settle in Jiangdong.
• Lan Tian: Portrayed as cunning and ambitious, aiming to control Jiao Province and its trade routes.

Significant Themes

• Ambition and Power: Both Sun Quan and Lan Tian display ambition in their desire to control territories and resources.
• Long-term Planning: Sun Quan's strategy involves long-term plans to reclaim Jiao Province and gain influence through Shi Xie's family.
• Loyalty and Trust: Hu Ke's loyalty is tested as Sun Quan considers his plan, and Sun Quan shows trust by appointing Hu Ke as Moling Commandant.

Character Interactions

• Sun Quan and Hu Ke: They discuss strategies and plans, with Sun Quan showing interest in Hu Ke's ideas and eventually appointing him as Moling Commandant.
• Sun Quan and Zhang Zhao: They discuss the situation in Jiao Province and Lan Tian's actions, with Zhang Zhao advising Sun Quan on how to handle Hu Ke.
• Hu Ke and Sun Quan: Hu Ke presents his plan to Sun Quan, expressing a desire to settle in Jiangdong and serve Sun Quan.

Key Plot Points and Events

• Hu Ke, now a spy for Jiangdong, establishes a trading firm in Jianye with Sun Quan's support.
• Sun Quan arranges a marriage between Hu Ke and Zhang Wen's younger sister to secure Hu Ke's loyalty.
• Cao Cao, enraged by Sun Quan's insults in the Yangtze Daily, decides to invade Jiangdong with a massive army.

Character Developments

• Hu Ke: Becomes a spy for Jiangdong, marries Zhang Wen's sister, and gains Sun Quan's trust.
• Sun Quan: Shows his fondness for indulgence and his desire to maintain control over his subordinates.
• Cao Cao: Becomes increasingly irritated by Sun Quan's insults, leading him to plan a large-scale invasion.

Significant Themes

• The power dynamics between Jiangdong and the State of Wei.
• The use of marriage alliances for political gain.
• The consequences of provoking a powerful enemy.

Character Interactions

• Sun Quan and Hu Ke: Sun Quan arranges Hu Ke's marriage to secure his loyalty.
• Cao Cao and Cheng Yu: Cao Cao shares his decision to invade Jiangdong with Cheng Yu, who expresses concerns about logistics.
• Liu Bei and Fa Zheng: Fa Zheng brings intelligence to Liu Bei, suggesting that the time to capture Hanzhong has arrived.

Key Plot Points and Events

• Liu Bei considers attacking Hanzhong while Cao Cao is distracted by the war with Sun Quan.
• Fa Zheng argues for an immediate attack, while Zhuge Liang and Pang Tong advise caution and preparation.
• Liu Bei decides to postpone the attack until after the next harvest due to insufficient supplies.
• Yi Ji is sent to congratulate Lan Tian on the birth of his daughter and reports back on the warm winter in Guangzhou City.

Character Developments

• Liu Bei shows strategic caution and willingness to listen to his advisors' opinions.
• Fa Zheng demonstrates boldness and confidence in his military strategies.
• Zhuge Liang and Pang Tong exhibit prudence and careful planning.
• Lan Tian shows favoritism towards his newborn daughter, causing concern among his older sons.

Significant Themes

• Timing and preparation in warfare.
• Parental favoritism and its impact on sibling relationships.
• The importance of balanced attention and care among family members.

Character Interactions

• Liu Bei consults with his strategists (Zhuge Liang, Fa Zheng, and Pang Tong) about the Hanzhong campaign.
• Lan Ji and Lan Yuan discuss their father's affection towards their newborn sister and their own martial pursuits.
• Gao Shun advises Lan Tian to spend more time with his older sons to avoid neglecting their feelings.

Key Plot Points and Events

• Lan Tian overhears his sons discussing their younger sister, showing their maturity and sibling bond.
• Yi Ji visits Jiao Province to request military supplies from Lan Tian for the upcoming Hanzhong campaign.
• The group discusses the impending war between Sun Quan and Cao Cao in Jianghuai.

Character Developments

• Lan Tian demonstrates his fairness and equality in treating his children.
• Yi Ji shows his responsibility and concern for the upcoming campaign.
• Lan Tian exhibits his strategic prowess and long-term planning.

Significant Themes

• Equality and fairness among siblings.
• Strategic planning and long-term vision.
• The importance of military supplies and preparation for war.

Character Interactions

• Lan Tian and his sons (Lan Yuan and Lan Ji) display a warm and understanding father-son relationship.
• Yi Ji and Lan Tian discuss military matters, showcasing their mutual respect and trust.
• The group of strategists (Xu Shu, Xiahou Qi, Yuan Yun, Jiang Wan, and Yi Ji) engage in a friendly and insightful discussion about the upcoming war.

Key Plot Points and Events

• Lan Tian learns that Hu Ke, his friend, wants to marry a woman from the influential Zhang family in Jiangdong.
• Sun Quan and Lan Tian have different plans for Hu Ke's marriage: Sun Quan wants to use Hu Ke to gain influence, while Lan Tian sees it as an opportunity to gather intelligence and check Sun Quan's power.
• Lan Tian prepares lavish wedding gifts for Hu Ke to curry favor with the Zhang family.
• Lu Lingqi gives birth, and Lan Tian's courtyard is bustling with visitors. Xu Shu and his mother stay behind after the guests leave.
• Lan Tian learns that Guan Yu has taken a liking to Lan Yuan and has reserved a special horse for him.

Character Developments

• Lan Tian shows his strategic thinking and long-term planning in supporting Hu Ke's marriage.
• Lu Lingqi shows her impatience with her postpartum confinement and her love for martial arts stories.
• Xu Shu reveals his reluctance to seek medical help for his lack of an heir.

Significant Themes

• The strategic use of marriage alliances for political gain.
• The importance of long-term planning and foresight.
• The role of martial arts and martial prowess in society.

Character Interactions

• Lan Tian and Sun Quan have different goals for Hu Ke's marriage, showing their differing political strategies.
• Lan Tian and Lu Lingqi share a moment of intimacy as he tells her a story to pass the time during her confinement.
• Lan Tian and Xu Shu discuss Xu Shu's lack of an heir, showing Lan Tian's concern for his friend's well-being.

Key Plot Points and Events

• Lu Lingqi and Lan Tian discuss the story of Bao Si and King You of Zhou, leading to Lan Tian sharing the tale of Xia Ji, a beautiful princess who brought ruin to several husbands and states.
• Lu Lingqi mentions Advisor Xu's decade-long marriage without children, suggesting Lan Tian inquire about it.
• The next day, Lan Tian takes Xu Shu on a walk through Guangzhou City, discussing road names and visiting the Medical Bureau.
• They encounter Shopkeeper Wang Shi, who seeks Lan Tian's help to buy sea-going ships from General Li Yi for maritime trade.

Character Developments

• Lu Lingqi: Shows sympathy for women in difficult situations and expresses concern for Advisor Xu's childless marriage.
• Lan Tian: Demonstrates his support for maritime trade and encourages Shopkeeper Wang Shi to expand his reach.
• Xu Shu: Struggles with his wife's inability to conceive, causing tension with his mother-in-law and wife of Yuanzhi.
• Shopkeeper Wang Shi: Struggles with the challenges of maritime trade and seeks better ships to expand his business.

Significant Themes

• The power and danger of beauty, as exemplified by Xia Ji's story.
• The importance of family and heirs, highlighted by Advisor Xu's childless marriage and the tension it causes.
• The encouragement and support of maritime trade, shown through Lan Tian's interactions with Shopkeeper Wang Shi.

Character Interactions

• Lu Lingqi and Lan Tian: Share stories and discuss personal matters, showing a close and open relationship.
• Lan Tian and Xu Shu: Discuss city planning, road names, and Xu Shu's personal issues, demonstrating their friendship and trust.
• Lan Tian and Shopkeeper Wang Shi: Discuss maritime trade, with Lan Tian offering support and encouragement to Wang Shi.

Key Plot Points and Events

• Lan Tian and Xu Shu discuss the benefits and risks of maritime trade and the potential of importing high-yielding rice from Linyi Kingdom.
• Lan Tian reveals his plan to use merchants to facilitate trade and control its influence on society.
• They visit a construction site, which turns out to be a new project by Lan Tian.

Character Developments

• Lan Tian demonstrates his strategic thinking and willingness to take calculated risks for potential gains.
• Xu Shu shows concern for the potential negative impacts of trade and the loyalty of those under their command.

Significant Themes

• The double-edged nature of trade and commerce: beneficial for economic growth but potentially harmful to societal stability.
• The importance of balancing different aspects of governance (agriculture, trade, and control of merchants) for the overall well-being of the state.
• The potential for importing advanced technologies or resources from other regions to boost local development.

Character Interactions

• Lan Tian and Xu Shu engage in a thoughtful discussion about the pros and cons of maritime trade and its potential impact on their region.
• Lan Tian reveals his long-term plans to Xu Shu, demonstrating trust and confidence in their relationship.

Key Plot Points and Events

• Xu Shu visits the construction site of the Medical College in Guangzhou, guided by Lan Tian.
• Xu Shu meets Hua Tuo (disguised as an old man) and has his pulse checked without knowing it.
• Xu Shu and his mother prepare to return to Jiangling after a two-month stay in Guangzhou.

Character Developments

• Xu Shu: Maintains his aversion to doctors, but his health is subtly monitored by Hua Tuo.
• Lan Tian: Shows his foresight and strategic planning in education and resource management.
• Hua Tuo: Disguises himself to examine Xu Shu's health, demonstrating his medical expertise and cunning.

Significant Themes

• Education: Lan Tian's vision for promoting education in various fields, including medicine.
• Health and Healing: The importance of health and the challenges in seeking medical help, as seen through Xu Shu's aversion to doctors.
• Resource Management: Lan Tian's efficient use of resources, such as the ocean's bounty and the potential of Movable Type printing.

Character Interactions

• Lan Tian and Xu Shu: Lan Tian guides Xu Shu through the construction site, revealing his plans for the Medical College and discussing Movable Type printing.
• Xu Shu and Hua Tuo: They meet without recognizing each other, and Hua Tuo examines Xu Shu's pulse discreetly.
• Mother Xu and Xu Shu: They discuss their plans to settle in Guangzhou for the sake of Xu Shu's future children's education.

Key Plot Points and Events

• Mother Xu returns from visiting Lady Lu, in high spirits due to the latter's new grandchildren.
• Wusihei arrives from Jiangdong with a kidnapped scholar, Mr. Zhao, as a gift for Lan Tian.
• Lan Tian devises a plan to make Mr. Zhao believe he was rescued from the Yue Tribe merchants by the Han officials.

Character Developments

• Mother Xu remains optimistic and focused on family lineage.
• Lan Tian demonstrates strategic thinking and adaptability in handling the unexpected situation with Mr. Zhao.
• Wusihei shows resourcefulness in carrying out Lan Tian's plan.

Significant Themes

• The importance of family lineage and continuation (through Mother Xu's perspective).
• The use of deception and manipulation in achieving goals (seen in Lan Tian's plan for Mr. Zhao).

Character Interactions

• Mother Xu and Xu Shu discuss family matters, with Mother Xu subtly pressuring Xu Shu about his marital status.
• Lan Tian, Gao Shun, and Wusihei discuss the situation with Mr. Zhao and plan their next steps.
• Lan Tian and Wusihei interact with Mr. Zhao, with Lan Tian playing the role of a rescuer to gain Mr. Zhao's trust.

Key Plot Points and Events

• Zhao Shuang, a middle-aged scholar, is kidnapped from Jianye and brought to Guangzhou City by the Yue Tribe to serve as an accountant.
• He is threatened with not being able to return to his family if he doesn't comply.
• Lan Ziyu, the Governor of Jiao Province, discovers Zhao Shuang and interrogates him.

Character Developments

• Zhao Shuang: Initially reluctant and scared, he eventually reveals his true background to Lan Ziyu.
• Lan Ziyu: Shows cunning and intelligence in uncovering Zhao Shuang's true identity.

Significant Themes

• Deception and truth-revelation
• Power dynamics and manipulation
• Family and loyalty

Character Interactions

• Zhao Shuang and Wusihei: Wusihei tries to persuade Zhao Shuang to work for him, while Zhao Shuang is reluctant and tries to negotiate.
• Lan Ziyu and Zhao Shuang: Lan Ziyu interrogates Zhao Shuang, using his knowledge of Jiao Province's families to pressure him into revealing his true identity.

Key Plot Points and Events

• Lan Tian discovers Zhao Shuang's mathematical prowess when he mentions Zhoubi Suanjing.
• Lan Tian asks Zhao Shuang to organize Shuiyue Trading Firm's chaotic accounts, which he does efficiently.
• Lan Tian introduces Arabic numerals (New Numerals) for easier calculation and recording.
• Lan Tian and Zhao Shuang engage in mental calculation contests using both Chinese and Arabic numerals.

Character Developments

• Lan Tian: Demonstrates his understanding of mathematics and introduces Arabic numerals to simplify calculations and recording.
• Zhao Shuang: Proves his exceptional mathematical skills, particularly in mental calculations. He shows gratitude towards Wusihei for introducing him to this knowledge.

Significant Themes

• The convenience and efficiency of Arabic numerals over Chinese characters for mathematical calculations and recording.
• The value of mathematical talent and its application in various fields, such as accounting and education.

Character Interactions

• Lan Tian and Zhao Shuang: Engage in a friendly competition of mental calculations, with Lan Tian introducing Arabic numerals to Zhao Shuang, who is impressed by their convenience.
• Lan Tian and Zhao Shuang: Discuss the possibility of Zhao Shuang working at the Guangzhou Academy to teach mathematics and annotate classics, showing Lan Tian's appreciation for Zhao Shuang's talent.