Liu Wai hung

Liu was born in Hong Kong with family roots in Shunde, Guangdong, China. He joined TVB in 1977. In the firm The Good, The Bad And The Ugly , he acted as a new immigrant from Mainland China called Ar Chan, so he got the nickname of Ar Chan from that moment. Also, Ar Chan became a popular name to represent new immigrants coming from Mainland between the 1970s and 1990s in Hong Kong.

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Source: Wikipedia