Zheng Cheng Gong - Season 1 Episode 20

Chu Ko Wei passes a false message to a Manchu spy that Cheng-gong's body is being transported to Ching Feng Stockade. Ta Ku-lun is tricked and he sends Ao Bai to invade the Stockade. Cheng-gong besieges Ao Bai and finally defeats him. Chung-yuan decides to help his father escape and though Cheng-gong realizes his plan, he is grateful for Chung-yuan's helpfulness and thus purposely lets Ao Bai go. Ta Ku-lun reveals Shih Fei to be a Han spy and beats him up for information but the latter refuses to yield. To free Shih Fei from further suffering, Chung-yuan kills him in one slash. Ta Ku-lun decides to marry Yung-ning to the Minister's son but she rejects since she is secretly devoted to Chung-yuan. Chung-yuan is moved and promises to marry Yung-ning.