Recently, the fourteenth Western China International Coal and New Energy Expo took place in Xi'an Qujiang International Convention and Exhibition Center. Shaanxi Heavy Truck Delong X3000 heavy truck, Delong new M3000 8 × 4 dual fuel dump truck and Delong new M3000 6 × 2 tractor were showed in the expo, attracting the attention of the government, the coal transport business and the media.