Shandong Weierxin Automobile Co., Ltd.'s brand Changrunda is a publicly announced enterprise approved by the Ministry of Industry and Information Technology to produce various trailers and special vehicles. The company is a specialized vehicle production enterprise that integrates product design, scientific research and development, production and sales. It produces eight series of full trailers, semi-trailers, warehouse trucks, low flatbed transport vehicles, container transport vehicles, dump trucks, bulk cement trucks, sedan transport vehicles, cement mixer trucks, and special vehicles, and can also customize specific vehicle models according to foreign customer requirements.