On March 8, 2014, Ningxia Chengye Engineering Machinery Co., Ltd. held the opening ceremony and product exhibition event of Caterpillar (Qingzhou) Co., Ltd.'s Dawukou 4S store, a mountain machinery brand, in Dawukou District, Shizuishan City, Ningxia Hui Autonomous Region. Yang Shubao, Chairman and General Manager of Caterpillar (Qingzhou) Co., Ltd., and leaders of the domestic sales team jointly attended and