Since mid-February, China has been urging industries to resume operations. However, barriers remain. CPCIF notes that 86% of chemical plants have reopened, but many of them are not in full operation. The lack of orders is a key reason, although manufacturers also still face raw material and transportation obstacles in addition to difficulty with implementing environmental protection rules. See here and see for info on the Hunan (here), Zhejiang (here), Shanghai (here) and Hongkong (here).