The economic aspects. After making a Treaty of trade and then service light Thai progress much more improvements to the economy, such as in the reign of photduang was changed to 4 and is silver coins and digging canals. In the reign of the 5 Thai money scale changes the decimal system is used. Use gold as a monetary standard instead of the money, take 25 Satang coin penny coins and money, rather than at the original. With the establishment of private banks for the first time is Siam แบางก์. Thai banks are commercial) In the reign of 6
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