Yuan Wah. In the film, Yam Tat-wah and Andy On play the role of special agents and apprentices, and the master and apprentices fight against each other at the peak. The tramp Cao Lao, played by Yuan Wah, also plays an important role in Uncle Hua's identity recovery. Chasing Zero is an action crime film, produced by iQiyi, directed by Huo Suiqiang, produced by Yam Tat-wah, and starring Yam Tat-wah, Andy On, Yuan Wah, Jiang Peiyao and Lei Mu.