The Shanghai authorities on Saturday issued epidemic prevention guidelines for local industrial enterprises to resume operations, aiming to secure and stabilize the industrial and supply chains.The guideline, released by the Shanghai Municipal Commission of Economy and Informatization, said all district governments should actively support enterprises to resume work and production and guide their epidemic prevention work.Enterprises should formulate an epidemic prevention and control mechanism and closed-loop management plans. Enterprises that cannot practice epidemic prevention measures or ensure safe production should not resume operations.