President of the Republic of Congo Denis Sassou Nguesso arrives at Capital International Airport in Beijing, capital of China, Sept. 2, 2018. Denis Sassou Nguesso is here for a state visit to China, and will attend the upcoming Beijing Summit of the Forum on China-Africa Cooperation (FOCAC). (Xinhua/Xing Guangli)

The plane with President of the Republic of Congo Denis Sassou Nguesso onboard arrives at Capital International Airport in Beijing, capital of China, Sept. 2, 2018. Denis Sassou Nguesso is here for a state visit to China, and will attend the upcoming Beijing Summit of the Forum on China-Africa Cooperation (FOCAC). (Xinhua/Xing Guangli)

President of the Republic of Congo Denis Sassou Nguesso arrives at Capital International Airport in Beijing, capital of China, Sept. 2, 2018. Denis Sassou Nguesso is here for a state visit to China, and will attend the upcoming Beijing Summit of the Forum on China-Africa Cooperation (FOCAC). (Xinhua/Xing Guangli)