Qin Kai (), was a general of the Kingdom of Yan during the Warring States period of China. He was at one time sent by Yan to Donghu as a hostage. After returning to Yan, around 300 BC, he defeated the Donghu and conquered the Liaodong Peninsula from Gojoseon. Qin Kai was grandfather of Qin Wuyang. See also Gojoseon–Yan War Zhou dynasty generals Military history of Liaoning 4th-century BC Chinese people Yan (state)