How many movies have David Wu and Horace Wong Wing-Hang collaborated on?

They have worked on 10 movies together! Their first movie together was A Better Tomorrow (1986) while their highest rated movie together was Hard Boiled (1992). They have not worked together since Hard Boiled (1992). They are most known for their action films together.

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Cafe Waiter
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Secretary Chiu
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General Cho's Interpreter