In 2014, the factory was invested and built in Dagang, and was officially put into operation at the end of 2014.

At present, the production capacity of acid dyes reaches 10000 tons. Especially the main black dye, it is a brand new production equipment and environment designed based on the combination of the production and operation of Sanhuan in the past 20 years and the world's most advanced production processes and equipment.

A diversified sewage treatment system has been designed as a whole, including various treatment units such as pre-treatment, biochemistry, and MVR. Ensure daily production sewage treatment meets discharge standards.

Comprehensive atmospheric absorption and monitoring. Conduct random sampling and testing at various key points every day to ensure that exhaust emissions meet standards throughout the day.