Returning workers bound for east China's Zhejiang Province wait for departure on the customized train at Chengdu East Railway Station in Chengdu, southwest China's Sichuan Province, Feb. 17, 2020. The customized train for returning workers left Chengdu on Monday, carrying more than 750 workers from Sichuan who are returning to work in Hangzhou, capital of Zhejiang Province, the first such train service in Sichuan. (Xinhua/Wang Xi)

Returning workers bound for east China's Zhejiang Province get on the customized train at Chengdu East Railway Station in Chengdu, southwest China's Sichuan Province, Feb. 17, 2020. The customized train for returning workers left Chengdu on Monday, carrying more than 750 workers from Sichuan who are returning to work in Hangzhou, capital of Zhejiang Province, the first such train service in Sichuan. (Xinhua/Wang Xi)

A returning worker bound for east China's Zhejiang Province waits for departure on the customized train at Chengdu East Railway Station in Chengdu, southwest China's Sichuan Province, Feb. 17, 2020. The customized train for returning workers left Chengdu on Monday, carrying more than 750 workers from Sichuan who are returning to work in Hangzhou, capital of Zhejiang Province, the first such train service in Sichuan. (Xinhua/Wang Xi)

Crew members wait for departure of a customized train at Chengdu East Railway Station in Chengdu, southwest China's Sichuan Province, Feb. 17, 2020. The customized train for returning workers left Chengdu on Monday, carrying more than 750 workers from Sichuan who are returning to work in Hangzhou, capital of Zhejiang Province, the first such train service in Sichuan. (Xinhua/Wang Xi)