Dayun Group, founded in 1947 in Yuncheng, Shanxi, began as a motorcycle manufacturer before diversifying into commercial vehicles and heavy trucks in 2004. The Dayun heavy-duty series features diesel engines compliant with China Euro IV standards and payload capacities up to 30 tons. In 2015, Dayun launched light-duty trucks and cargo vans under the Dayun brand, focusing on urban logistics with engine options from Yuchai Power and Weichai Power. By 2023, Dayun vehicles served domestic and Southeast Asian markets with robust chassis designs and modular configurations.