Later in 343, Emperor Kang's other uncle, Yu Yi (), proposed a major military campaign against Later Zhao, in coordination with Former Yan's ruler Murong Huang and Former Liang's ruler Zhang Jun, both nominal Jin vassals. Most officials feared this large undertaking, but with support from Yu Bing, Huan Wen (Emperor Kang's brother-in-law, having married his sister Sima Xingnan () the Princess Nankang), and Sima Wuji () the Prince of Qiao, Emperor Kang approved the plan and mobilized troops. Yu Bing was made a governor to coordinate with Yu Yi, and He Chong was recalled to replace him, and served in conjunction with Emperor Kang's father-in-law Chu Pou () (who, however, soon yielded his post). However, Yu Yi eventually, for reasons unknown, largely did not carry out his campaign, although he made some border attacks.