E du dinh trong khoang 6000 m ko qua va dua leo ! Nhung cach lam gian nhu tu xua la dung cay cha (tre ) de lam gian cho day leo ! Theo hien gio thi gia cha e thay hoi cao! E thay co noi dung luoi keo tu duoi len cho dayleo nhu vay co tiet kiem hon kg vay ? No co chac hon la dung cha(tre) kg vay? Hay co cach nao xin cc cao nhan chi dum e ! Xin cam on ratnhiu !:6^: