Shanghai Ruinian Industrial Co., Ltd., founded in 1998, is a professional company engaged in the sales, design, installation and maintenance of central air conditioning engineering. Have professional air conditioning system designers, construction teams and professional maintenance technicians. The company takes "quality first, reputation first, service first" as its purpose. Ruinian has been engaged in the supply and demand of idle central air-conditioning equipment for a long time, which not only clears the supply and demand channels for the society, but also makes many enterprises. Therefore, Shanghai Ruinian enjoys a good reputation in the society. There are many brands of second-hand central air-conditioning equipment and refrigeration in Ruinian, including many famous brand products and intact products. The second-hand central air-conditioning equipment supplied by Ruinian is of good quality, low price and high quality, providing one-stop service and perfect installation warranty. Always firmly believe: quality is the foundation of survival, service is the guarantee of credibility, honesty is the way of development, and innovation is the source of market.