Botswana's President Mokgweetsi Masisi lays a wreath at the Monument to the People's Heroes at the Tian'anmen Square in Beijing, capital of China, Sept. 1, 2018. (Photos: Xinhua)

President of Burkina Faso Roch Marc Christian Kabore lays a wreath at the Monument to the People's Heroes at the Tian'anmen Square in Beijing, capital of China, Sept. 1, 2018.

Cote d'Ivoire's President Alassane Ouattara lays a wreath at the Monument to the People's Heroes at the Tian'anmen Square in Beijing, capital of China, Sept. 1, 2018.

Ghana's President Nana Akufo-Addo lays a wreath at the Monument to the People's Heroes at the Tian'anmen Square in Beijing, capital of China, Sept. 1, 2018.