A large crowd staging a sit-in at Hong Kong's International Airport yesterday to protest against preferential treatment that was allegedly extended by airline staff to Hong Kong Chief Executive Leung Chun Ying's daughter. About a week ago, she allegedly left behind a piece of cabin baggage at the airline's check-in desk, which is in the non-restricted area of the airport. Realising her mistake when she was at the boarding gate, she allegedly got her father to demand that airline staff retrieve it for her. The sit-in was organised by the Hong Kong Cabin Crew Federation. Protesters said the incident involving Ms Leung potentially compromised airline safety and the security of the public.