 During the Cheng period, Taiwan continued to operate as a major international trading post as it continued trade with various foreign countries.A strict ban on Han Chinese immigration from the coastal cities of China was instituted by the Kingdom of Cheng and Taiwan was transformed into an autocratic system resulted a long period of economic stagnation as its prominence as a global trading post regressed.After defeating Koxinga's private army, the Qing government had no interest in improving the economy of Taiwan, calling it an uncivilized land ("huawai zhi di").