Since the foreign exchange reform in 2014, every time the renminbi depreciated to a high point against the US dollar, it has been higher than the previous round, and there have been waves of depreciation over a long period of time. Relaxation of the epidemic was beneficial once, not to change supply chain migration, nor to slump in domestic consumption. After relaxation, tourism and other industries broke out once, then became weak for a long time. The next depreciation cannot be blamed for the control of the epidemic.