Xiyu Township (; PhaÃÂk-fa-sá¹³: Sî-yÃÂ-hiông) is a rural township encompassing Xiyu/Hsiyu/Si Island/Hsi Island, also known as Fisher Island, Yuweng or Pescadores Island (), which is among the three major islands of the Penghu County (the Pescadores), Taiwan. It has a population of 8,301 and an area of 18.7148 square kilometres.
The major scenic spots include some forts and lighthouse. They were built or reconstructed in the Qing Dynasty, and were credited as National Relic Site of Taiwan.
On July 16, 1683, the island was attacked by Qing forces in the Battle of Penghu.
On March 10, 2012, President Ma Ying-jeou visited the area and participated in religious ceremonies at temples in the township.
The township includes two inhabited islands, Yuweng Dao (Yü-weng Tao, Gyoà Â-tà Â; æ¼Âç¿Â島; Hî-ong-tó) and Xiaomen Yu (Siaomen Islet, Hsiaomen Island, Hsiao-men hsü, Shà Â-mon-sho; å°ÂéÂÂ嶼; Sió-mnÃÂg-sà «), and one small uninhabited island, Haiqian Reef (æµ·å¢Âç¤Â; Hái-kînn-ta).
The township includes eleven rural villages:
Xiyu is connected to neighboring Baisha by the Penghu Great Bridge. <br />