China's Hong Kong discusses its constitutional responsibility for national security

Chief Executive of China's Hong Kong Special Administrative Region (HKSAR) Lam Cheng Yuet-ngor addresses a symposium in Hong Kong, south China, April 15, 2018. China's HKSAR marked on Sunday the country's third National Security Education Day with a symposium that discussed the HKSAR's constitutional responsibility for national security. (Xinhua/Li Peng)