Zhangjiagang Liaoyuan Environmental Protection Technology Co., Ltd was established in 2011 as a technical service enterprise for supporting Shagang Group's 6 million tons of coke production capacity, with a total investment of up to CNY 70 million yuan; equipped with the first large-scale desulfurization waste liquid treatment facility in China, it can daily treat 300 tons of wastewater; its annual wastewater treatment capacity is 100,000 tons, and the annual ammonium thiocyanate output is 9,000 tons.