Chiayi County (Mandarin pinyin: jiā yì xiàn; Hokkien POJ: Ka-gī-koān) is a county in southwestern Taiwan surrounding but not including Chiayi City. It is the sixth largest county in Taiwan. Name The former Chinese placename was Tsu-lo-san (), a representation of the original Formosan-language name Tirosen. A shortened version, Tsulo, was then used to name Tsulo County, which originally covered the underdeveloped northern two-thirds of the island. In 1704, the county seat was moved to Tsulosan, the site of modern-day Chiayi City. Following the 1723 Zhu Yigui rebellion, the county was reduced in size. In 1787, the county and city were renamed Chiayi (; ) by the Qianlong Emperor to acknowledge the citizens' loyalty during the Lin Shuangwen rebellion. History Qing dynasty Chiayi County was originally part of Zhuluo County during the Qing dynasty. It was given its modern name by the Qianlong Emperor after the Lin Shuangwen rebellion in 1788 for its role in resisting the rebels. Empire of Japan From 1920, during the Japanese rule of Taiwan, the area of Tainan Prefecture covered modern-day Chiayi County, Chiayi City, Tainan and Yunlin County. Republic of China After the handover of Taiwan from Japan to the Republic of China on 25 October 1945, the area of present-day Chiayi County was administered under Tainan County. In October 1950, Chiayi County was established as a county of Taiwan Province. Chiayi City was designated as the county seat. In July 1982, Chiayi City was upgraded to a provincial city, thus in December 1981, Chiayi County government relocated the county seat to Dongshiliao Farm in Taibao Township. In March 1989, Wufong Township was renamed Alishan Township. In July 1991, Taibao Township was reorganized as Taibao City. In November 1991, Chiayi County government relocated the county seat from Dongshiliao Farm to Hsiangho New Village in Taibao City. Puzi Township was reorganized as a county-administered city in September 1992. Geography Chiayi County borders Mount Yu to the east, Taiwan Strait to the west, Tainan City to the south and Yunlin County to the north. It spans over , about 5.35% of the area of Taiwan. Chiayi County is located along the Tropic of Cancer. Administration Chiayi County is divided into 2 cities, 2 urban townships, 13 rural townships and 1 mountain indigenous township. Taibao City is the seat of Chiayi County and is home to Chiayi County Government. The Chiayi County Council is however located in