Shandong Liangshan Tongya Automobile Co., Ltd. is listed among appointed enterprises to produce and refit automobile approved by former Economy and Trade Commission of China (now Development and Reform Commission of China), the first private enterprise with its products listed in Public Notice on automobile refitting for management. The company integrates product design, scientific research and development, production and sale together. Its leading products are various kinds of custom built car and special automobile including “Tongyada” brand semitrailer, tipper, oil tank truck, particle material transportation automobile, bulk-cement delivery tanker, concrete mixer truck and road wrecker in series, etc.