China's president arrives in Hong Kong to mark handover anniversary

Chinese President Xi Jinping and his wife Peng Liyuan arrive at the airport in Hong Kong, China, ahead of celebrations marking the city's handover from British to Chinese rule, June 29, 2017. REUTERS/Bobby Yip

HONG KONG (Reuters) - China's President Xi Jinping arrived in Hong Kong on Thursday to mark its 20th anniversary of Chinese rule as the city went into lockdown with a massive security blanket ahead of celebrations and protests on July 1.

Britain returned Hong Kong to Chinese rule in 1997 under a "one country, two systems" formula which guarantees wide-ranging autonomy and judicial independence not seen in mainland China.