Sun Moon Empire

Biodata

History

Continental Collision and First War

The Sun Moon Empire was already an established state when a collision between continental plates connected its homeland to Douluo four thousand years before the main story. Cultural conflict escalated into war, and its advanced technology brought the Douluo Three Kingdoms close to destruction 10.

Shrek Academy’s head rallied approximately sixty Titled Douluo for a counterattack, inflicting a decisive defeat on the empire. Sun Moon was forced to accept a humiliating treaty, while Shrek gained prestige exceeding that of the imperial families 10 128.

The defeat did not end the rivalry. Sun Moon and the original Douluo nations remained hostile for thousands of years, even as border commerce and clandestine soul-tool sales continued 44 75.

First Tournament Championship

The Sun Moon Royal Soul Engineer Academy entered the Soul Fighting Tournament burdened by its longstanding reputation as the perpetual runner-up. Before the finals, Xiao Zi approached its team under the name Li Lezi and proposed cooperation against Shrek. Meng Hongchen supported accepting his offer despite Elder Ma’s and Xiao Hongchen’s suspicions 75.

Shrek forfeited the team battle, and Xiao Zi subsequently staged a defeat against Meng Hongchen in the individual competition. Sun Moon won the championship 2–0, breaking Shrek’s ten-thousand-year winning streak. The Star Luo authorities upheld the result despite Zhou Yi’s protest 78.

The team rewarded Xiao Zi with an agreed-upon soul bone. He also expressed willingness to visit Sun Moon through a future student exchange 79.

Exchange Program and Recruitment

Jing Hongchen initially intended to probe Shrek’s defenses with Level 9 Soul Cannons. Xiao Zi warned him about the academy’s powerful experts, persuading him to withdraw the weapons and visit as an ordinary guest. Jing subsequently finalized a student exchange with Shrek 82 83.

The delegations exchanged students at Maple Leaf City two years later. Xiao Zi traveled to Mingdu with Shrek’s group, seeking knowledge unavailable in the Douluo nations for his Demon Slayer Race Clone 92.

Jing later recruited the clone, publicly known as Demon Slayer Douluo, as an academy teacher. The empire granted him a marquisate and a fief, and Crown Prince Xu Tianran presided over his investiture. Access to Level 9 advisers, research facilities, and imperial medicines accelerated his development 99.

Defense of Mingde Hall

The Body Sect attacked Mingde Hall in an attempt to hinder Sun Moon’s military preparations. Earlier warnings from Xiao Zi and an alarm raised by his clone allowed the defenders to prepare and evacuate personnel. The attack failed, costing the empire only about a dozen soul engineers; its experimental humanoid soul tool survived intact 104.

The clone nevertheless exploited the confusion to steal rare metals and valuable soul tools. Imperial authorities attributed the missing goods to the Body Sect. Sun Moon retaliated by sharply raising export prices for rare metals and high-grade soul tools, increasing its revenues while straining relations between the Body Sect and the Douluo Three Kingdoms 104.

Mingdu Tournament and Detentions

As host of the next Soul Fighting Tournament, Sun Moon opened participation to both academies and sects. The revised competition placed individual matches first and permitted lethal outcomes without punishment. Its academy team defeated Shrek again and advanced to the grand final 113 119 125 131.

Xu Tianran used the gathering to target foreign talent and experienced soul masters before launching a continental war. Imperial forces intercepted departing teams, while representatives of the Douluo nations and Shrek planned an attack on the Imperial Palace 128 131.

After the palace confrontation, Sun Moon publicly condemned the foreign attack and confined participating teams in Rising Sun City. Captives received food and drink but could not leave; the Soul Engineer Corps was ordered to kill escapees. Xu Tianran offered their release in exchange for allegiance and future obedience, threatening household extermination for violations 135.

Destruction of Shrek

Xiao Zi brokered a temporary alliance between Sun Moon and Di Tian’s soul beasts, arguing that destroying Shrek would remove a major obstacle to imperial unification. Jing Hongchen led a Soul Engineer Corps into position outside Shrek City without alerting the academy’s leadership 148 149.

A Level 10 Super-Concentrated Soul Cannon contributed to the destruction of Shrek and the elimination of its senior leadership. Xu Tianran celebrated the removal of the institution that had thwarted Sun Moon’s first continental invasion. Former Shrek graduates in the Douluo nations demanded retaliation 150.

Continental Invasion

After ascending the throne, Xu Tianran launched a large-scale invasion. An opening offensive against Star Luo shattered sections of its defenses in the Mingdou Mountain Range, but the empire’s main objective was Heaven Dou to the north 151.

Dai Huabin and the Demon Slayer Race Clone negotiated a settlement while misleading their respective governments. Star Luo accepted annual tribute and regular delegations to Mingdu in exchange for a suspension of attacks; the clone presented this to Xu Tianran as Star Luo’s submission. The agreement secured Sun Moon’s southern front 151.

Sun Moon then attacked Heaven Dou without facing Star Luo intervention. A single soul engineer legion ambushed Dou Ling’s relief army of more than one hundred thousand troops, leaving fewer than one thousand survivors. Some were deliberately released to spread fear 152.

Within two years, Sun Moon overthrew both Heaven Dou and Dou Ling and incorporated the northern territories. It subsequently slowed its advance to integrate its conquests and replenish depleted rare-metal supplies. Ju Zi helped establish a policy of introducing civilian soul tools into ordinary households, reducing the cost of consolidating imperial rule 152.

Government and Key Figures

Territory and Locations

Institutions and Technology

Sun Moon Royal Soul Engineer Academy

• Located on Mingdu’s southern outskirts, its hexagonal campus occupies an area comparable to a medium-sized Douluo city 92.
• Divided into teaching, dormitory, and experimental districts; experimentation occupies approximately two-thirds of the grounds 92.
• Offers exchange students twice-weekly opportunities to study at Mingde Hall, with temporary membership available through an internal examination 92.
• Fields the empire’s principal tournament team, including the Hongchen siblings and, during its championship campaign, captain Ma Rulong 75 131.

Mingde Hall

• The empire’s highest research institution, named after Kong Deming 92 104.
• Develops advanced weapons, including an experimental humanoid soul tool 104.
• Produces the Level 8 Tyrant Tiger Soul Refining Blade, which permanently incorporates a soul-bone skill and increases soul-skill attack power by fifty percent 67.
• Restricts access to sensitive knowledge; ordinary exchange participation does not guarantee admission 104.

Military Capabilities

• Soul Engineer Corps: Organized formations capable of overwhelming conventional armies; one legion destroys Dou Ling’s relief force during the northern campaign 152.
• High-Energy Compression Soul Tool Arrays: Surround Mingdu, replacing the need for city walls. They can shield the entire capital or deliver attacks described as capable of instantly annihilating a Limit Douluo 92.
• Level 9 soul tools: Include the Sealing God Platform and Ye Yulin’s Sun Moon Divine Needle. The latter operates at altitudes up to sixteen hundred meters and covers a strike area thirty kilometers in diameter 45 131.
• High-altitude soul tools: Manufactured in large numbers during the continental war, consuming substantial rare-metal reserves 152.

Civilian Technology and Trade

• Portable equipment: Compressed tents expand from spheres when supplied with soul power 94.
• Household tools: Devices usable by commoners without soul power help win acceptance in conquered northern territories 152.
• Rare-metal resources: The empire possesses valuable materials unavailable in the original Douluo nations, supporting both manufacturing and lucrative exports 132.
• Export controls: Selling Level 9 soul tools to the Douluo Three Kingdoms is prohibited, though smugglers circulate high-grade weapons through foreign auctions and black markets 44 68.
• Economic leverage: Export-price increases after the Mingde Hall attack force foreign buyers to pay several times the usual cost 104.

External Relationships

• Xiao Zi / Li Lezi — Strategic collaborator rather than a claimant to the throne. He helps secure the first championship, strengthens imperial defenses, and arranges cooperation against Shrek, while retaining plans independent of the empire 78 101 104 148.
• Shrek Academy — Historic enemy responsible for defeating the first invasion. A limited student exchange does not end their rivalry; Sun Moon later participates in Shrek’s destruction 10 83 150.
• Star Luo Empire — Major southern adversary. Its wartime settlement with Sun Moon creates a temporary respite, but border skirmishes and fortification continue 151 152.
• Heaven Dou and Dou Ling Empires — Northern opponents conquered during Xu Tianran’s campaign; their surviving forces seek refuge in Star Luo 152.
• Body Sect — Anti-Sun Moon power whose failed attack on Mingde Hall triggers imperial economic retaliation 104.
• Holy Spirit Cult — Expedient ally against the Douluo nations’ soul masters. Xu Tianran intends to settle accounts with the Evil Soul Masters after victory, while Ye Xishui expects the cult to become the unified empire’s state religion 119 151.
• Evil Eye Tyrant Ruler — Revered as the empire’s guardian divine beast; cooperates in sophisticated soul-tool research involving spiritual power 105.
• Di Tian and the Star Dou soul beasts — Temporary allies brought together by Xiao Zi to destroy Shrek, aided by the absence of substantial historical conflict between their territories 148 149.