Hong Kong salesman goes on trial for manslaughter after allegedly pushing older man who banged head on ground and died

• Leung Ching-yin, 28, has denied unlawful killing of Chow Chun-wo, 63, who died from brain injuries two days after their dispute
• The two men got into an altercation when Chow jumped line at Central ferry pier after march on June 16, 2019, court hears