 Chen Xu returned to Chen in 562 and became a key official in Emperor Wen's administration.Initially, Northern Zhou continued to detain Chen Xu's wife Liu Jingyan and son Chen Shubao, but after further negotiations, Northern Zhou released them as well.Meanwhile, Emperor Wen began to consider the problem of local warlordism—which rendered the modern Jiangxi, Fujian, and large parts of Zhejiang under warlord control and only nominally submissive to him.