What is "tengzhong"

Sichuan Tengzhong Heavy Industrial Machinery Company Ltd , usually shortened to ) is based in Chengdu, China. Sichuan Tengzhong is a privately owned company known for making a wide range of road equipment, such as bridge piers, highway construction and maintenance machinery. Sichuan Tengzhong has been moving more into heavy-duty trucks, including tow trucks and oil tankers.