Date of Birth: 
Place of Birth: Chaozhou, Guangdong, China
About Alvin Cheng
- Alvin Cheng Kam-mun (Chinese: ???, born 23 June 1988), also known as "4 Eyes Brother" (Chinese: ????), is a Hong Kong student activist, active since 2014.
- He was a former student at Queensland University of Technology in Australia, and organised a rally with his schoolmates and Nardo Wai in support of the Hong Kong Umbrella Movement during the 2014 G20 Brisbane summit.
- His political opinions include the use of violence to fight against the police force.
- He is well known for participating in the Hong Kong Umbrella Movement, and establishing the student activism organization Student Front.
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