- Hoac khong ro rang la tro chai (vi nhu tro miia mo, cQng se noi sau), vi khong nhk thiSt nham an thua giua hai phe (hay nhieu
d thung lung chan niii, van hoa an tgc hgc quy inh ca hai hinh thuc san xuat: nuong ray va ruong nuac Nguai Muong ciing a
thung lung nhu vay, va hg cung c6 ca hai hinh thuc san xuk,
nhung tren binh dien y thuc hg huang ve ruong nuac, hg xem
ruong nuofc la chinh, con nuong r i y mac du c6 v i tri rk quan trgng
trong cugc song van bj coi la phu. Vai hg muenh na pa roong tuc la mot ruong bang ba ray. Xom lang ciia nguai Muong thuong dat a ba thung lung nhung ngoi nha ciia hg (loai nha dai cua vao hai dau hoi) phia cua so dugc coi la truoc mat phai huang v6 ruong va trong san nha bac tren la hudng cua s6, do la nhung diSu chiing to ruong nuac dugc coi trgng. Thung lung chan niii dugc coi la nai 586
thk nghiem liia nuac. (3 Thai Lan, den giai doan sit, liia nuac mai
xuong dong bang, con a Viet Nam liia nuac dugc dua xuong dong
bang s(Tm hon vi ly do bung no dan so a cac ba song cu bai ap lire
dan so tu phia Bac xuong, ma cac tgc nguai a day nhao xuong dong bang. Su thong lien giua dong bang song Hong voi cac vung thung lung nay, khong gay tra ngai cho nhung dgt song d6n dan ay. Neu dong bang song Hong la moi truong qui dinh nen van hoa Ilia nuac thi thung lung, nai con nguai the nghiem liia nuac, lai la moi truong ket hgp nuong ray va liia nude. Nhung xa hgi da the nghiem lam ruong nude a viing thung lung khong con chung tich,
CO dieu hien nay viing thung lung con ton tai mot che do xa hgi
dac biet tren nhieu mat khac dong bang. (CJ dong bang Bac Bg, Trung Bg, Nam Bg to chuc xa hgi c6 net khac nhau nhung nhin chung giong nhau). Hien nay con hai tgc nguai bao lim to chirc xa hgi vung thung liing: nguai Thai d Tay Bac va ngudi Mudng d bd song Day giap Ha N g i , Ngudi Thai cd che do Pia - Tao, ngudi Mudng giong nhau tren nhieu net Idn, khac vdi dong bang con ngudi Tay, ngudi Nung d Viet Bac von cung cimg che do xa hgi do nhung da bien dang, vi no la vung bien gidi nen bugc trieu dinh nha nude vdi tay tdi va nam chat.