A Hong Kong policeman stands guard at Hong Kong's border with Shenzhen, China April 29, 2016. REUTERS/Bobby Yip

A Hong Kong policeman stands guard at Hong Kong’s border with Shenzhen, China April 29, 2016. REUTERS/Bobby Yip

A Hong Kong policeman stands guard at Hong Kong's border with Shenzhen, China April 29, 2016. REUTERS/Bobby Yip

May 5, 2016 2:31 AM (UTC+8)