宿州市
In 977, Chen decided to go to Kaifeng to pay homage to the new emperor. Emperor Taizong sent the official Cheng Deyuan () to meet him at Su Prefecture (宿州, in modern Suzhou, Anhui) to welcome him. Once Chen arrived at Kaifeng, he was welcomed in a grand ceremony. Chen, then, under the advice of his staff member Liu Changyan (), decided to surrender his territory (Pinghai Circuit, consisting of Quan and Zhang Prefectures) to the Song emperor completely. Emperor Taizong accepted, ending the semi-independence of the region. (Chen's surrender of the territory helped persuade Qian Chu to do the same with his Wuyue kingdom later in the year.)