China Railway First Bureau Group Fifth Engineering Co., Ltd. (formerly Ministry of Railways First Bureau and Five Divisions) is a national first-class comprehensive construction enterprise with first-class railway general contracting qualification; first-class professional contracting qualification for road bridges, tunnels, and earthwork; railway track laying , Beam erection, Grade II qualification for hydraulic tunnels, and Grade A qualification for geological environment management and geological disaster prevention and control engineering construction. During the construction of the Beijing-Shanghai high-speed railway, the company used our company's West Lake series ultrasonic level gauges to pump and drain the groundwater level and surface water. In the construction of the project, our ultrasonic level gauge can adapt to the high humidity environment on site, and the operator can still work until the end of the project even if the operator does not understand the wrong use of the meter. Won the praise of front-line workers.