Alvin Cheng Kam-mun ( , born 23 June 1988 ) , also known as " 4 Eyes Brother " ( ) , 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
2014 G20 Brisbane summit
2014 G20 Brisbane summit
Alvin Cheng