Contestants take part in a benchwork competition during a national vocational skills contest in Nanjing, east China's Jiangsu Province, Aug. 17, 2018. Finals of six occupations will be held in Nanjing, Shenyang, Baoji and Zhengzhou from Aug. 17 to the end of September. (Xinhua/Ji Chunpeng)

A contestant takes part in a benchwork competition during a national vocational skills contest in Nanjing, east China's Jiangsu Province, Aug. 17, 2018. Finals of six occupations will be held in Nanjing, Shenyang, Baoji and Zhengzhou from Aug. 17 to the end of September. (Xinhua/Ji Chunpeng)

A contestant takes part in a benchwork competition during a national vocational skills contest in Nanjing, east China's Jiangsu Province, Aug. 17, 2018. Finals of six occupations will be held in Nanjing, Shenyang, Baoji and Zhengzhou from Aug. 17 to the end of September. (Xinhua/Ji Chunpeng)

Contestants take part in a benchwork competition during a national vocational skills contest in Nanjing, east China's Jiangsu Province, Aug. 17, 2018. Finals of six occupations will be held in Nanjing, Shenyang, Baoji and Zhengzhou from Aug. 17 to the end of September. (Xinhua/Ji Chunpeng)

A contestant takes part in a benchwork competition during a national vocational skills contest in Nanjing, east China's Jiangsu Province, Aug. 17, 2018. Finals of six occupations will be held in Nanjing, Shenyang, Baoji and Zhengzhou from Aug. 17 to the end of September. (Xinhua/Ji Chunpeng)

A contestant takes part in a benchwork competition during a national vocational skills contest in Nanjing, east China's Jiangsu Province, Aug. 17, 2018. Finals of six occupations will be held in Nanjing, Shenyang, Baoji and Zhengzhou from Aug. 17 to the end of September. (Xinhua/Ji Chunpeng)

A contestant takes part in a benchwork competition during a national vocational skills contest in Nanjing, east China's Jiangsu Province, Aug. 17, 2018. Finals of six occupations will be held in Nanjing, Shenyang, Baoji and Zhengzhou from Aug. 17 to the end of September. (Xinhua/Ji Chunpeng)