In the next year, he was defeated by Hoàng Đình Ái and fled to Longzhou, China.
He was attacked by Trịnh lord, and sought aid for Ming China.
Trịnh lord had to recognized his dominant position in Cao Bằng under the pressure of Ming China.
[1] In 1600, Bùi Thị, the mother of Mạc Mậu Hợp, rebelled in Thang Long and summoned him.
Trịnh Tùng recaptured Thang Long and executed Bùi Thị, then defeated Cung in Hải Dương.