As COVID-19 continues to spread, face mask production lines are back at full swing in a factory in Shenzhen after a prolonged Spring Festival holiday due to the epidemic, March 2, 2020. /Xinhua

Workers are required to wear masks to prevent viral transmission in a fan factory in Shenzhen, March 2,2020. /Xinhua

9,187 factories which accounts for 94.5% of the total factories in Shenzhen have restarted production by the end of February, according to local statistics. /Xinhua