The second edition of the Guidelines for Shanghai Industrial Enterprises to Resume Production with Pandemic Prevention and Control has been released, with several articles modified and some new measures added.The responsibilities of "\\;four parties"\\; – namely, governments at all levels, competent authorities of various industries, enterprises and employees – are clarified.Enterprises should set up different risk areas, such as a green zone for normal production, a blue zone for observation of new entrants, a yellow zone for close contacts or secondary close contacts, and a red zone for the infected. Each zone should be isolated from each other.