Photo taken on Nov. 12, 2016 shows commemorative stamps for the 150th anniversary of Sun Yat-sen's birth in Beijing, capital of China. China Post issued a set of commemorative stamps for the 150th anniversary of Sun Yat-sen's birth on Saturday. (Xinhua/Li He) 

A staff member shows commemorative stamps for the 150th anniversary of Sun Yat-sen's birth at the former residence of Sun's wife Soong Ching Ling in Beijing, capital of China, Nov. 12, 2016. China Post issued a set of commemorative stamps for the 150th anniversary of Sun Yat-sen's birth on Saturday. (Xinhua/Li He) 

A woman shows a first day cover of commemorative stamps for the 150th anniversary of Sun Yat-sen's birth at the former residence of Sun's wife Soong Ching Ling in Beijing, capital of China, Nov. 12, 2016. China Post issued a set of commemorative stamps for the 150th anniversary of Sun Yat-sen's birth on Saturday. (Xinhua/Li He) 

People buy commemorative stamps for the 150th anniversary of Sun Yat-sen's birth at the Baiwanzhuang post office in Beijing, capital of China, Nov. 12, 2016. China Post issued a set of commemorative stamps for the 150th anniversary of Sun Yat-sen's birth on Saturday. (Xinhua/Li He) 

Photo taken on Nov. 12, 2016 shows commemorative stamps for the 150th anniversary of Sun Yat-sen's birth in Hong Kong, south China. Hong Kong Post issued a set of commemorative stamps for the 150th anniversary of Sun Yat-sen's birth on Saturday. (Xinhua/Wang Shen) 

Photo taken on Nov. 12, 2016 shows a souvenir sheet containing four stamps for the 150th anniversary of Sun Yat-sen's birth in Hong Kong, south China. Hong Kong Post issued a set of commemorative stamps for the 150th anniversary of Sun Yat-sen's birth on Saturday. (Xinhua/Wang Shen) 

A girl shows a set of commemorative stamps for the 150th anniversary of Sun Yat-sen's birth in Nanjing, capital of east China's Jiangsu Province, Nov. 12, 2016. (Xinhua/Sun Can)