Seizcou mbwn haemq hawq- sauj, vunz ok nyouh noix, sainyouh mbouj ndaej cingqcinegz cungswiq vunz couh yungzheih baenz cenzlezsenyenz. Itbuen boux vunz ngoenz gwn 2000 hauzswngh raemx, couh ndaej ok nyouh daeuj cungswiq sainyouh、coicaenh raemxiemq cenzlezsen baiz okdaeuj, couh ndaej yawhfuengz cenzlezsen ganjyenj lo.

Linghvaih, nyouh gaep siz ciengeiz gaej nyaenx youq. Miz haujlai vunz aenvih hong nyaengq lai cix nyaenx nyouh mbouj ok, doeklaeng nyouh dauqfanj lae dauq ndaw rongznyouh yinxhwnj baenz cenzlezsen rengz dingj bingh doek- daemq. Linghvaih, ceiq ndei dwg mbouj gwn laeuj mbouj cit ien, mbouj gwn manh, lai gwn raemx.

Conhgyah giengzdiuh naeuz, naengh miz nyouh deih、nyouh gip、ok nyouh insep、ok nyouh mbouj ndaej、naetnaiq、gvanbaz swnghhoz cizlieng doekdaemq daengj cingz- gvang, wng gibseiz bae yihyen genjcaz ceihyw.