As a youth, Crown Prince Sun Deng accompanied Lu Xun to Jiangxia to oversee its defense, focusing on keeping the people safe and bringing order to military and government affairs. He established market tokens, repaired dikes and put safeguards in place, and trained soldiers without disrupting farming. In secret, he planned to pacify the Shanyue, open up military farms, and reorganize local militias into a new army. Abroad, he forged ties with Shu Han, arranged trade and mutual aid along the river, and waited for an opportunity to cut off Wei’s supply routes and support the northern front. By stabilizing Jiangdong through institutions and strengthening the army through popular support, he proceeded step by step to rewrite Wu’s fate.