In early August, at the construction site of the Duoji tunnel under the Sichuan-Tibet railway project, on the Qinghai-Tibet plateau at an altitude of 4,000 meters above sea level, many Weichai Baudouin 6M33 engines  have been handed over to the customer and put into stable operation, providing a reliable power source for this project.

The construction of the Sichuan-Tibet railway was faced with many difficulties because of the high altitude difference, harsh environment, especially in the highlands lacking oxygen, and the engines were prone to power loss problems due to high altitudes. plateau reaction. However, 6M33 still operates stably, completely meeting the strict requirements for durability and high reliability, thereby receiving positive reviews from customers.