A staff worker examines bottles of vinegar in Zhenjiang, east China's Jiangsu Province, Feb. 18, 2021. Enterprises all over the country started operation again on Thursday as the Spring Festival holiday came to an end. (Photos: Xinhua)

Employees work at a machinery company in Mianzhu, southwest China's Sichuan Province, Feb. 18, 2021. Enterprises all over the country started operation again on Thursday as the Spring Festival holiday came to an end.

Employees work at a hardware company in Zixing, central China's Hunan Province, Feb. 18, 2021. Enterprises all over the country started operation again on Thursday as the Spring Festival holiday came to an end.

An employee works at an electronics company in Sihong, east China's Jiangsu Province, Feb. 18, 2021. Enterprises all over the country started operation again on Thursday as the Spring Festival holiday came to an end.