Xi Jinping, general secretary of the Communist Party of China (CPC) Central Committee, Chinese president and chairman of the Central Military Commission, delivers an important speech at a ceremony marking the centenary of the CPC in Beijing, capital of China, July 1, 2021. (Xinhua/Ju Peng) 

BEIJING, July 1 (Xinhua) -- Xi Jinping, general secretary of the Communist Party of China (CPC) Central Committee, Chinese president and chairman of the Central Military Commission, started delivering an important speech at a ceremony marking the centenary of the CPC on Thursday.