Thai economic issue between reign 4-5 period, The first issue is England seek to amend the new Burney Treaty. Thailand will not pretend that English is mandatory. Thailand made the Bowring Treaty with Britain's significant economic, 1855 as follows. British merchants to trade in markets and through liberalism by Thai workers in the middle of the Thai tax 3 percent inbound, outbound goods for use at the rate defined in the contract end coordinates. The last one is extraterritoriality of people in Thailand have forced the British to the Bowring Treaty undefined. Disable or change the time But the changes will change only when both parties agreed. Thailand's economic structure began to change in a better way, by the monopolies and material to form free trade. Trade grew more extensive production systems to be updated. From subsistence production to production for export.