The company was founded in October 1992. Approved by the China Securities Regulatory Commission, it was listed on the Shenzhen Stock Exchange (stock code: 002871) in May 2017. the production base is located in Qingdao High-tech Zone and Laizhou City. The company is a high-tech enterprise specializing in the design, development, manufacture and sales of water supply and drainage valves. Products and solutions are provided for downstream application fields such as urban water supply and drainage system, fire water supply system, air conditioning HVAC system and sewage treatment system. The company has the ability to provide gate valve, butterfly valve, globe valve, regulating valve, plug valve, check valve, pressure reducing valve, alarm valve, rain valve and so on, with a total of more than 2000 specifications, which can meet the one-stop purchasing needs of customers. At the same time, two casting automatic production lines built by the wholly-owned subsidiary Laizhou Weilong fund-raising project have been put into production, which have undertaken casting high-quality casting processing products for automobile and agricultural machinery enterprises. Corporate honors: high-tech enterprises, famous trademarks of Shandong Province, etc.