tariffs have a negative reaction to trade, in SIPA trade negotiation, let all tariff rate be 0, and for trading partners and Thailand, what happened? IF all items we put on table of negotiations if all tariffs came down to 0 to all ASEAN plus 6 SIPA countries, can differentiate in each sector, the food products, how much Thailand can export, Thai can export to Korea and increate 5% per year, and China 5.9 percent, and can apply this