In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
Q: Passage: Lynn and her sister Sue are computer hackers, assassins and espionage specialists who use their late father's secret satellite technology to gain an advantage over their rivals and law enforcement agents. At the beginning of the film, they infiltrate a high security building and assassinate Chow Lui, the chairman of a top company in China.
After their successful mission, a police inspector named Kong Yat-hung is assigned to investigate the case and she manages to track down the assassins. In the meantime, Chow Lui's younger brother Chow Nung, who hired Lynn and Sue to kill his brother so that he can become the chairman, wants to kill the assassins to silence them. The cat-and-mouse chase becomes more complicated as both the police and the thugs are out to get Lynn and Sue.
Sue has always been playing the role of the assistant by staying on the computer and helping to disable the security systems and giving instructions on navigating the area, while Lynn, who is older and more experienced, does all the field work. Sue is jealous and thinks that Lynn refuses to let her participate more actively because she is less adept, but actually Lynn is trying to protect her sister from danger. Their relationship becomes strained when Lynn falls in love with her friend's cousin Yen and wants to give up her job and marry Yen. Sue intends to continue her career as a contract killer so that she can prove that she is as good as her sister.
A:
Who kills the chairman of a company in China?