In 1661, Koxinga led his troops on a landing at Lakjemuyse (鹿耳門) to attack the Dutch colonists in Dutch Formosa. 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 Siege of Fort Zeelandia and defected to Koxinga's Chinese forces.[20] 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 May 17, 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.[21] On 1 February 1662, the Dutch Governor of Formosa, Frederik Coyett, surrendered Fort Zeelandia to Koxinga. According to Frederick Coyett's account written after the siege to absolve himself of the Dutch defeat, during the siege, Koxinga's life was saved by a certain Hans Jurgen Radis of Stockaert, a Dutch defector who strongly advised him against visiting the overrun ramparts, which he knew would be blown up by the retreating Dutch forces.[22] This claim of a Dutch defector only appears in Coyett's account and Chinese records make no such mention of any defector. In the peace treaty, Koxinga was styled "Lord Teibingh Tsiante Teysiancon Koxin" [2]. This effectively ended 38 years of Dutch rule on Taiwan. Koxinga then devoted himself to transforming Taiwan into a military base for loyalists who wanted to restore the Ming Dynasty.