Other than some mining and fishing, agriculture was the main exercise of most Vietnamese, and economic development and trade weren't promoted or encouraged because of the point out.[62]Chi?n l??c tìm cách thúc ??y h?p tác khoa h?c qu?c t??l?n h?n, v?i k??ho?ch thi?t l?p m?ng l??i các nhà khoa h?c Vi?t Nam ??n??c ngoài và kh?i x??ng m?t m?ng