With its heat treatment equipment designed by itself and processing technology accumulated over many years, Dowa provides services to improve the functional characteristics of the parts and models entrusted by customers.

Today, more and more attention is paid to global environmental protection, Tonghe is more committed to the development of surface conditioning technology that can meet future environmental needs.

Adhering to the core value of "good products start with a good environment", Tonghe insists on entrusted processing operations for heat treatment in factories that meet environmental protection standards.