HONG KONG, July 1, 2016 (Xinhua) -- Hong Kong Special Administrative Region (HKSAR) Chief Executive Leung Chun-ying addresses a cocktail party to mark the 19th anniversary of the establishment of the HKSAR at the Hong Kong Convention and Exhibition Center in Hong Kong, south China, July 1, 2016. (Xinhua/Lui Siu Wai)