Competitors participate in a professional skills contest held in Guiyang, capital of southwest China's Guizhou Province, July 11, 2018. A total of 225 competitors from across the province took part in this contest. (Xinhua/Tao Liang)

A competitor participates in a professional skills contest held in Guiyang, capital of southwest China's Guizhou Province, July 11, 2018. A total of 225 competitors from across the province took part in this contest. (Xinhua/Tao Liang)

A competitor participates in a professional skills contest held in Guiyang, capital of southwest China's Guizhou Province, July 11, 2018. A total of 225 competitors from across the province took part in this contest. (Xinhua/Tao Liang)

Competitors participate in a professional skills contest held in Guiyang, capital of southwest China's Guizhou Province, July 11, 2018. A total of 225 competitors from across the province took part in this contest. (Xinhua/Tao Liang)

A competitor participates in a professional skills contest held in Guiyang, capital of southwest China's Guizhou Province, July 11, 2018. A total of 225 competitors from across the province took part in this contest. (Xinhua/Tao Liang)

Competitors participate in a professional skills contest held in Guiyang, capital of southwest China's Guizhou Province, July 11, 2018. A total of 225 competitors from across the province took part in this contest.(Xinhua/Tao Liang)