China's ambassador to Mexico Qiu Xiaoqi (L) gives a speech at the National Autonomous University of Mexico (UNAM) celebrating the 20th anniversary of Hong Kong's return to China, in Mexico City, capital of Mexico, on June 28, 2017. China's ambassador to Mexico Qiu Xiaoqi said here on Wednesday that China is willing to negotiate a free-trade agreement with Mexico. (Xinhua/Francisco Canedo)
