Hyosung Vietnam was established in 2007 specializes in manufacturing products such as Tire cord, Spandex, Steel cord.

• In 2013, Thuan Hai started operating a steam boiler with a capacity of 20 tons/hour from Hyosung Vietnam.
• In 2016, Hyosung Dong Nai handed three 25-ton steam boilers over to Thuan Hai.
• In 2020, Thuan Hai received three more thermal oil boilers, each with a capacity of 10 million Kcal/hour.

With Thuan Hai's companion, Hyosung has optimized operating costs, administrative costs, supported waste treatment activities from the production industrial process.