At the time, southern Vietnam was producing rice in plentiful quantities but export was banned by Minh Mạng, but prices in Vietnam, which were lower than those overseas, kept rising by 50–100% in various parts of the country in five years.
Pada saat itu Vietnam selatan memproduksi beras dalam jumlah berlimpah namun ekspor dilarang oleh Minh Mạng; bagaimanapun harga beras di Vietnam, yang mana lebih rendah dibandingkan dengan di luar negeri, terus naik sebesar 50–100% di berbagai belahan negara tersebut selama lima tahun.