to the Daily Journals of Fort Zeelandia (), Dutch colonizers frequently employed males from nearby indigenous tribes, including Hsin-kang (新港) and Mattau (麻豆) as foot-soldiers in the general militia, to heighten their numbers when quick action was needed during rebellions or uprisings. Such was the case during that of the Guo Huaiyi Rebellion in 1652, where the conspirators were eventually bested and subdued by the Dutch through the sourcing of over a hundred native Taiwanese aborigines. However, the Taiwanese Aboriginal tribes who were previously allied with the Dutch against the Chinese during the Guo Huaiyi Rebellion in 1652 turned against the Dutch during the later Siege of Fort Zeelandia and defected to Koxinga's Chinese forces. The Aboriginals (Formosans) of Sincan defected to Koxinga after he offered them amnesty, the Sincan Aboriginals then proceeded to work for the Chinese and behead Dutch people in executions, the frontier aboriginals in the mountains and plains also surrendered and defected to the Chinese on 17 May 1661, celebrating their freedom from compulsory education under the Dutch rule by hunting down Dutch people and beheading them and trashing their Christian school textbooks. Legacy and contributions Today their legacy in Taiwan is visible in the Anping District of Tainan City, where the remains of their Castle Zeelandia are preserved; in Tainan City itself, where their Fort Provintia is still the main structure of what is now called Red-Topped Tower; and finally in Tamsui, where Fort Antonio (part of the Fort San Domingo museum complex) still stands as the best preserved redoubt (minor fort) of the Dutch East India Company anywhere in the world. The building was later used by the British consulate until the United Kingdom severed ties with the KMT (Chinese Nationalist Party or Kuomintang) regime and its formal relationship with Taiwan. Similarly, much of the economic policy driven by the Dutch during the colonial period was subsequently used as a basis for the beginnings of Taiwan's modern international trade. The beginnings of Taiwan's mercantile history and contemporary economy can be attributed to the port systems that were facilitated during the Dutch Formosa period. However, perhaps the most lasting result of Dutch rule is the immigration of Chinese to the island. At the start of the Dutch era, there were estimated to be between 1,000 and 1,500 Chinese in Taiwan, mostly traders living in aboriginal villages. During Dutch Formosa rule, Dutch colonial policies encouraged the