Sun Lin was Sun Quan's grandnephew, the grandson of Sun Qiang, Sun Jian's eldest brother, and the son of General Who Conquers the Captives Sun Ben. At nine years old, he inherited his father's rank and acted as governor of Yuzhang, becoming the youngest commandery governor of the Three Kingdoms era.
(Note: Most online sources record that Sun Ben died in 219, but I hold a different view. Based on deduction, I believe it was 210, for three reasons.
First, Sun Lin was born in 202 and inherited his rank at nine, which puts it in 210. Second, Gu Shao entered office in the same year Sun Lin succeeded to the position and replaced him as governor of Yuzhang. Gu Shao served for five years and died in 214, which likewise points back to 210. Third, according to Records of the Three Kingdoms: "In 208, Cao Cao appointed Sun Ben General Who Conquers the Captives; he continued to govern the commandery as before and died after eleven years in office." Sun Ce pacified Yuzhang at the beginning of 200 and appointed Sun Ben as its governor; from 200 to 210 was exactly eleven years.
In summary, I suspect that some editor of the source material failed to investigate the matter, simply added eleven years after 208 to get 219, and later writers merely copied and pasted the claim.)
Not long after Sun Ce pacified Jiangdong, he died. Sun Quan succeeded him in haste, his foundations still unsteady. Sun Qiang's two sons, Sun Ben and Sun Fu, both looked down on Sun Quan. Thus, though Yuzhang and Luling nominally belonged to the Sun Clan, the two commanderies had in truth become states within a state.
Before Chibi, Sun Ben had already been secretly exchanging overtures with Cao Cao. Sun Fu was