Delegates attend a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee

China's President Xi Jinping (L) and Premier Li Keqiang arrive to attend a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee

China's President Xi Jinping arrives to attend a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee

China's President Xi Jinping delivers a speech at a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee

China's President Xi Jinping arrives to attend a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee

China's President Xi Jinping (C) leaves after a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee

China's President Xi Jinping (L) shakes hands with former Hong Kong chief executive Tung Chee-hwa after a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee

An attendant checks seats after a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee TPX IMAGES OF THE DAY

China's President Xi Jinping delivers a speech at a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee

China's President Xi Jinping delivers a speech at a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee

China's President Xi Jinping delivers a speech at a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee

China's President Xi Jinping delivers a speech at a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee

China's President Xi Jinping delivers a speech at a conference commemorating the 150th birth anniversary of Sun Yat-Sen, widely recognised as the father of modern China, at the Great Hall of the People in Beijing, China, November 11, 2016. REUTERS/Jason Lee