Constroctors from China Construction First Group participate in a competition on occupational skills in Beijing, capital of China, Oct. 10, 2020. (Xinhua/Jin Liangkuai)

Judges examine the decoration work of a constructor during a competition on occupational skills, which is held by China Construction First Group, in Beijing, capital of China, Oct. 10, 2020. (Xinhua/Jin Liangkuai)

Constroctors from China Construction First Group participate in a competition on occupational skills in Beijing, capital of China, Oct. 10, 2020. (Xinhua/Jin Liangkuai)

Constroctors from China Construction First Group participate in a competition on occupational skills in Beijing, capital of China, Oct. 10, 2020. (Xinhua/Jin Liangkuai)