Chinese artists paint on-site during a Chinese art exhibition in Mexico City, capital of Mexico, Aug. 1, 2019. A Chinese art exhibition kicked off in Mexico City on Thursday to celebrate the 10th anniversary of the twinning between Mexico City and Beijing. (Photo by Francisco Canedo/Xinhua)

A visitor views paintings during a Chinese art exhibition in Mexico City, capital of Mexico, Aug. 1, 2019. A Chinese art exhibition kicked off in Mexico City on Thursday to celebrate the 10th anniversary of the twinning between Mexico City and Beijing. (Photo by Francisco Canedo/Xinhua)

Visitors view paintings during a Chinese art exhibition in Mexico City, capital of Mexico, Aug. 1, 2019. A Chinese art exhibition kicked off in Mexico City on Thursday to celebrate the 10th anniversary of the twinning between Mexico City and Beijing. (Photo by Francisco Canedo/Xinhua)