Duke Mu of Qin's daughter Wen Ying married Ji Yu, the crown prince of Jin. Unexpectedly, Ji Yu secretly fell in love with Wen Ying's cousin Huai Ying. It happened that Chong'er came to Qin for help. Wen Ying was furious and married Chong'er. Chong'er succeeded in restoring the country. Wen Ying helped Chong'er reorganize Jin.