Long-haul tractor units primarily operate on high-speed expressways, characterized by high annual mileages and stringent requirements for operational timeliness. Customers prioritize stable and efficient operational availability, with a focus on engine fuel consumption and reliability. Weichai offers dedicated solutions featuring the WP12H, WP14H, WP15Hs, WP14NG, WP15NG, and WP16NG series, with displacements ranging from 11 L to 16 L, power outputs from 530 Ps to 750 Ps, and a maximum torque of 3,400 N·m. Weichai's products, focused on fuel efficiency, stability, and reliability, represent an ideal choice for customers seeking to enhance operational efficiency and profitability.