Like Melon Seeds used cars, our company also sells second-hand kapangyarihan transformers to the outside world. Generally, we recycle old customers’ power transformers and sell them to new customers. In this case, selling second-hand power transformer will achieve low cost. High return, can provide waste recycling to old customers, of course, will provide some resources for old customers. New customers can buy second-hand transformers at low prices. Therefore, the company is right to sell second-hand power transformers.