He was a member of Ricci Hall, HKU and led its development actively. In his third year, he was elected as the president of Ricci Hall Student Association, HKU, and led the Hall to win HKU Sports Championship ──Malayan Cup. In Summer 2014, People's Republic of China has passed the "831 decision" and White paper, this led him to believe that the HKSAR government had decided to ignore the promise made in Sino-British Joint Declaration. In September 2014, Umbrella Revolution erupted, besides part-timing in an art gallery and studying, Leung spent most of his time joining the movement. On 30 November, Leung and a group of protesters occupied the Central Government Complex, in response to the call from Hong Kong Federation of Students and Scholarism. After facing clearance from Hong Kong Police Special Tactical Squad, he believed occupational movements could not lead to changes. His graduation was delayed to 2016.