The fourth Chinese domination was a period of the history of Vietnam, from 1407 to 1427 during which the country was ruled by Ming Dynasty administrators. Culturally, the Chinese imported many Chinese books and literature . Meanwhile, all classical Vietnamese books and materials relating to Vietnam were suppressed. Various ancient sites such as pagoda Bao Minh were looted and destroyed. The Ming Dynasty wanted to spread more of its Chinese culture in the area. Customarily, all Việt people were made to wear Chinese-style clothing. The Chinese had greatly encouraged the development and... the use of gold and silver mines. But right after the silver and gold were extracted they impounded them and sent a fraction of these minerals to Beijing. They also imposed salt taxes, but a slightly heavier tax against those who produced salt in Annam. To keep the people under control in Vietnam, the Ming government issued, and utilized the "So Ho" system, at the lowest village community level. Whenever there was a change in a family, a change in the book was recorded and approved.
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