Princedom of Jin (晋王) was a princely peerage created by Hongwu Emperor for his third son, Zhu Gang.
The generation poem given by the Hongwu Emperor was:"济美钟奇表，知新慎敏求，审心咸景慕，述学继前修" Ji Mei Zhong Qi Biao, Zhi Xin Shen Min Qiu, Shen Xin Xian Jing Mu, Shu Xue Ji Qian XiuThe generation poem was used until "shen" (审) generation, which was the same generation as that of Tianqi Emperor and Chongzhen Emperor.
Zhu Gang's fief was located in Taiyuan Prefecture of Yushan (于山)
The fief was located in Fen Prefecture The peerage was first created in1404 for Zhu Jihuan.The peerage was created for Zhu Jilang in 1403.
The fief was located in Taiyuan prefecture of Shanxi.