On April 18, 2025, Financial World reported that information from the National Intellectual Property Administration shows that Lincheng County Chengya Auto Parts Manufacturing Co., Ltd. has obtained a project named "43782." The patent for the "leak-proof semi-trailer compartment" has been granted with the announcement number CN222742794U and the application date is July 2024. 

The patent abstract shows that the present utility model belongs to the technical field of semi-trailers, and specifically relates to a leak-proof semi-trailer body. The body includes a bottom plate, side panel and body door, and the side panel is fixed on both sides of the bottom plate. The lower part of the body door is hinged to the bottom plate, and the two sides of the body door are detachable and connected to the two side body panels. There are two horizontal leak-proof structures, which are respectively set at the connection points between the two side panels and the bottom plate. The horizontal leak-proof structure includes an upper limit plate, a lower limit plate and a first leak-proof cloth. The upper limit plate is fixed on the side panels. A T-shaped limit slot is provided on the bottom surface. A T-shaped limit slot is provided on the lower limit plate. There are T-shaped limit blocks on both sides of the first leak-proof cloth and they are limited and clamped with the T-shaped limit slot. Two vertical leak-proof structures are set up, respectively at the connection points between the two side panels and the door. The vertical leak-proof structure includes a fixed limit end set on the side panels, a movable limit end set on the door, and a second leak-proof cloth. Both the fixed limit end and the movable limit end are provided with T-shaped limit slots, and T-shaped limit blocks are set on both sides of the second leak-proof cloth. 

According to Tianyancha, Lincheng County Chengya Auto Parts Manufacturing Co., Ltd. was established in 2011 and is located in Xingtai City. It is an enterprise mainly engaged in the automotive manufacturing industry. The registered capital of the enterprise is 20 million RMB. Through the big data analysis of Tianyancha, Lincheng County Chengya Auto Parts Manufacturing Co., Ltd. has 1 trademark piece of information, 13 patent pieces of information, and in addition, the enterprise also holds 4 administrative licenses.