The Matsu Islands mainly consist of five islands, Nangan, Beigan, Dongju, Xiju, and Dongyin. In the early years, they were battlefields, and they were not actively developed. Most of the original features were preserved. In the early years, the islanders relied mainly on fishing, so most of their settlements were close to the harbor. The Fujian-style old houses are made of local stone, and the architectural tone is harmoniously compatible with the environment, forming a very special ae sthetic feeling. The geology of Nangan and Beigan is mainly composed of granite, and Dongyin is mainly composed of diorite. In addition, it used to be a battlefield, and the roads are not as open as Taiwan's main island, so most of them are steep. However, since there are airports and ports in Nangan and Beigan, and Dongyin also has regular boat trips, it is not difficult to bring bicycles to and fro. In addition, the three islands have special geology and unique cultural features, so they are suitable to visit by riders with climbing skills. Of course, if time permits, the two islands of Dongju and Xiju in Juguang Township are also suitable for inclusion in the Matsu Islands bike journey. This itinerary is a three-day tour. On the first day, we start from Fu'ao Harbor in Nangan or the B&B where we booked to stay. We circle the island in a counterclockwise direction and visit the Mazu statue, Tianhou Temple, Jinsha Village, Iron Fort, Beihai Tunnel, and Dahan Stronghold, 88 Tunnel and other scenic spots. On the second day, take a boat to Baisha Harbor in Beigan, and visit Banli Vil., Tangqi Vil., Houao village, Luoshan Nature Trail, Qiaozi Village, Qinbi Village, Mazu Broadcast Station and other scenic spots in sequence. For riders who love a challenge, they can try the Yuntai Mountain Military Intelligence Building in Nangan, and the Bi Mountain Observation deck in Beigan, which are the highest points of the two islands. On the third day, take a regular boat from Nangan to Dongyin. With the departure of the boat, use one to two days to visit the Andong Tunnel of Dongyin island, Dongyin Lighthouse, Yixiantian Cliff, the Northernmost Frontier of Xiyin island, Sanshan Strongpoint, and other scenic spots. Then take a boat from Dongyin and return directly to the main island of Taiwan, or take a boat to Nangan and a plane or express boat back to Taiwan to complete your Matsu bicycle journey.