The Biao Mien of China, numbering approximately 43,000 people, are Engaged yet Unreached. They are a Yao subgroup of Guangxi's Lipu, Mengshan, Pingle, and Zhaoping counties in China, descended from Tang dynasty-era highlanders labeled mo yao, or exempt from corvee, for retreating into the mountains rather than submit to imperial taxation. They mostly adhere to Ethnoreligion and Biao Mon is their primary language.