During the epidemic period, Harbin Heavy-duty Gear Transmission Equipment Co. Ltd employees still stick to their posts to create value for industry and agriculture. Among them, the ZLY series reducer produced by the Harbin Heavy-duty Gear Transmission Equipment Co. Ltd played an important role during the epidemic, the company adopts the sales mode of almost zero profit and adopts the multi-group of employees to work overtime to make reducers of the important medical equipment mask machine and distribute it to the major mask production companies and the biotechnology companies.