Liu Yan (traditional Chinese: 劉 龑; simplified Chinese: 刘 䶮; pinyin: Liú Yǎn; 889 – 10 June 942), né Liu Yan (劉巖), also known as Liu Zhi (劉陟) (from c. 896 to 911) and briefly as Liu Gong (劉龔), formally Tianhuang Dadi (天皇大帝) with the temple name Gaozu (高祖), was the first emperor of the Chinese Five Dynasties and Ten Kingdoms period state Southern Han.