Our products are rarely used in valve factories, but we will have a cooperative relationship. Because many parts of our products have ball valves. They are used to ensure that our products can still operate when the pipeline works. This is very important for industrial production, because it can save the time of stopping production for machine maintenance. Our products in several categories can be made into model with ball valves, so we have a lot of cooperation with valve factories. In this field, we help each other and jointly help customers formulate the most appropriate pipeline cleaning plan.