▁B ai yi ▁ <0xE6> <0x91> <0x86> <0xE5> <0xBD> <0x9D> ▁by ▁the ▁Han ▁Chinese ) ▁is ▁a ▁variety ▁of ▁Tai ▁Ya ▁ <0xE5> <0x82> <0xA3> 雅 ▁spoken ▁by ▁ 1 1 8 ▁people ▁in ▁the ▁ 2 ▁villages ▁of ▁Sh it ou zh ai ▁ 石 头 <0xE5> <0xAF> <0xA8> ▁and ▁X ia om iao ▁ 小 <0xE5> <0xBA> <0x99> ▁in ▁Pan long ▁Township ▁ <0xE7> <0x9B> <0x98> 龙 乡 , ▁District ▁ 5 ▁ 五 区 , ▁X in ping ▁County , ▁Y unn an ▁( You ▁ 2 0 1 3 : 2 6 8 ). ▁He ip u ▁ <0xE9> <0xBB> <0x91> <0xE8> <0x92> <0xB2> ▁is ▁a ▁Han ▁Chinese ▁ex onym ▁referring ▁to ▁their ▁practice ▁of ▁teeth ▁black ening . ▁In ▁X in ping ▁County , ▁the ▁He ip u ▁also ▁refer ▁to ▁themselves ▁as ▁the ▁Tai ▁K ha ▁ <0xE5> <0x82> <0xA3> <0xE5> <0x8D> <0xA1> ▁( You ▁ 2 0 1 3 : 3 3 6 ). ▁It ▁is ▁mut ually ▁intellig ible ▁with ▁Tai ▁Ya ▁as ▁spoken ▁in ▁District ▁ 4 ▁ 四 区 ▁of ▁X in ping ▁County . ▁However , ▁He ip u ▁is ▁unique ▁in ▁that ▁it ▁has ▁only ▁ 4 ▁t ones , ▁and ▁has ▁lost ▁the ▁final ▁stops ▁- p , ▁- t , ▁- k . ▁He ip u ▁is ▁not ▁to ▁be ▁confused ▁with ▁ 2 ▁other ▁groups ▁of ▁the ▁same ▁name : ▁ ▁He ip u ▁ <0xE9> <0xBB> <0x91> <0xE8> <0x92> <0xB2> , ▁an ▁eth nic ▁Z hu ang