Who are the 20 key groups in Chongqing?

2 entry and exit, customs, market supervision system front-line personnel.

3, police, sanitation workers, security guards, cleaning staff, port transport practitioners, couriers, utilities and other staff.

4, home isolation medical observation or home health monitoring personnel, local epidemic aid workers, epidemic prevention and control personnel, vagrants and beggars, scattered decoration construction personnel.

5, the elderly, patients with chronic basic diseases, pregnant women, children, the disabled and other people.