Zheng's three brothers founded the shock absorber manufacturing company and formally changed its name to ADD Industry (Zhejing) Co. in 1994.
Zhengyu Automotive Parts Company was established
ADD Industry participated in AAPEX auto parts Exhibition for the first time.
Started shock absorber export business and international cooperation.
Ningbo plant was put into use.
Developed over 9,000 types of products.
Production qty reaches 10,000,000 units per year.
Lean Production was implemented in Ningbo plan
ADD Industry was successfully listed on the Shanghai Stock Exchange.
Update & CGP companies were acquired by the ADD group
Building the ADD's International team
New brand PRT was released during AAPEX show.
PRT is the North American brand of ADD, the largest exporter of aftermarket shock absorbers and struts in the world. ADD was the first ride control products manufacturer and more than 25 years later operates three factories that produce nearly 2,000,000 shocks and struts every year.
ADD USA, INC