[1] The island is located in the estuary of Shantou port, and has an area of 0.97 square kilometers, an elevation of 39 meters, and a coastline of 2.3 km.
[1] In the 19th century when Shantou was a treaty port, Mayu was the location of the British and American consulates and a customs house.
[1] In the 56th year of the Kangxi Emperor (1717), Mayu Island was placed under the responsibility of Nan'ao's Chenghai Xiezuo Battalion (南澳澄海协左营), but the people who resided there were still under the administration of Chaoyang.
[3] The British customs house on the island became a symbol of the establishment of the treaty port, and it was designated a protected monument of Shantou in 1994.
[1] An 1860 American missionary source reported that about twenty foreigners and 2,000 Chinese lived on "Double Island" and that it was known locally as "Má-sù".
[1] In the water near the island's dock is a piece of pumice that locals call the "stone with the mark of the mother" (simplified Chinese: 妈印石; traditional Chinese: 媽印石; pinyin: mā yìn shí), said to be a vestige left by Mazu when she became a spirit and disappeared into the ocean.