context: Captain Zhao Wu Yi is the leader of the Brocade Guards, the government's secret police. The sergeant of the force is Zhao's elder son, Zhao Bu Fa. Zhao also has a younger son in the force, Zhao Bu Qun, whom he executes after he questions him about whether or not he would kill his father if he committed a crime, which he answers "No".
  The force works under a childish, womanizing Emperor who is irresponsible to his duties. The blood thirsty Eunuch Wang Zhen usually bribes the Emperor with woman and the Emperor gives his powers to the eunuch. Zhao Bu Fa has never been fond of the eunch. Eunuch Wang then orders The Brocade Guards to kill two righteous guards Yu Hua Long and Li Yi. Zhao refuses to kill them and resigns from the force. The furious eunuch then orders Zhao Wu Yi to kill his son; he sends his men to kill him but his troupe are no match for Zhao. And so, Zhao survives every time.
  Zhao then goes into hiding with his wife Xue Liang and son Ding Dong in his ancestral village. His whole clan are there and his uncle Zhao Wu Ji is their leader. Things work out fine, until a message is sent to the village ordering the clan to Kill Zhao Bu Fa or they will be executed. They decide to kill Zhao, where Zhao and his uncle engage in a duel and he kills his own uncle. Zhao's sister Wu Xiao Nan, who did not want to kill Zhao later gives Zhao a poisoned cup of tea; they engage in a fight where Zhao kills Wu, and he and his family escape.
  They meet up with Zhao's brother, who reveals that his execution was fake, it was just to show the Brocade Guards what would happen to them if they disobey an order. Bu Qun then treats his brother's poison and later disguises himself as his brother. He ends up sacrificing himself for his brother and family to live a peaceful life. Xue Liang repays his kindness by killing herself. The Jinyi troupe brings Bu Qun's head to show Wu Yi, who is saddened and says that he does not actually want his son to die. Eunuch Wang tries to completely take over the Emperor's throne. Zhao Bu Fa calls for a duel with Wang. They engage in a duel in the mountains and Zhao chops off Wang's left arm, later killing him by chopping him in half. After the duel, Zhao informs his father that he has killed Eunuch Wang.
question: Who is captain of the Brocade Guards?
answer: Captain Zhao Wu Yi