In 937, Liu Yan (Chinese: 劉龑; Vietnamese: Lưu Nham), the Southern Han ruler took the chance to intervene in Vietnam after the death of the Annam Lord Protector Dương Đình Nghệ.
Pada tahun 937, Liu Yan (Hanzi: 劉龑; bahasa Vietnam: Lưu Nham), penguasa Han Selatan, mengambil kesempatan untuk campur tangan di Vietnam setelah kematian Tuan Pelindung Annam, Dương Đình Nghệ.