yes, it was notified on March 21th.

The epidemic prevention and control headquarters of novel coronavirus, Shenzhen issued a notice on the 21th. From the 21th, the party and government organs, enterprises, institutions, production and business units in Shenzhen resumed normal working order and production and operation, and the buses and subways fully resumed operation, ensuring the safety and stability of the supply chain of the industrial chain and ensuring the smooth and orderly production and life of the people.