A Myanmar Now report and report released by Shan Human Rights Foundation (SHRF) released November 2025 accusied that Shanghai Chijin Xiawu Metal Resources Co. Ltd., a joint venture between Xiamen Tungsten Co. Ltd. and Chifeng Jilong Gold Mining Co. Ltd., through its 90%-owned subsidiary China Investment Mining Company, caused severe environmental destruction and human rights risks in eastern Shan State, Myanmar. According to the SHRF report, the company’s gold and rare-earth mining operations along the Kok River in Mong Yawn, Mong Hsat Township, have rapidly expanded since mid-2025. The report alleges that runoff and chemical waste, including arsenic, lead, and sodium cyanide, are flowing directly into the Kok River, contaminating water sources and heightening flooding risks on both sides of the Myanmar–Thailand border. SHRF warns that this contamination now threatens over one million people in northern Thailand’s Chiang Mai and Chiang Rai provinces, and potentially tens of millions downstream along the Mekong River. It further links Shanghai Chijin Xiawu’s subsidiary to similarly destructive rare-earth mining in northern Laos.

The Business and Human Rights Resource Centre had reached out to Chifeng Gold and Chifeng Jilong Gold Mining for comment. They did not respond.