A woman works at a smart socks production line in Shiyan, North China's Hebei province, on March 24, 2020. [Photo/Xinhua]

Employees work at a smart socks production line in Shiyan, North China's Hebei province, on March 24, 2020. [Photo/Xinhua]

An employee works at an auto production line in Wuhan, Central China's Hubei province, on March 24, 2020. [Photo/Xinhua]

An employee named Chen Anxin prepares to board a train heading for Guangzhou to resume work in Wuhan, Central China's Hubei province, on March 19, 2020. [Photo/Xinhua]

An employee checks products at a workshop in Wuhan, Central China's Hubei province, on March 24, 2020. [Photo/Xinhua]

Some buses resume transportation in Wuhan, Central China's Hubei province, on March 25, 2020. [Photo/Xinhua]

A woman takes a bus in Wuhan, Central China's Hubei province, on March 25, 2020. [Photo/Xinhua]

Some buses resume operation in Wuhan, Central China's Hubei province, on March 25, 2020. [Photo/Xinhua]

A staff member assembles equipment in Langfang, North China's Hebei province, on March 24, 2020. [Photo/Xinhua]

A staff member tests a running machine in Langfang, North China's Hebei province, on March 24, 2020. [Photo/Xinhua]