[15] During the Ming and Qing dynasties, the island was abandoned several times due to the Great Clearance edicts.

[13] In 1869, the Qing government erected tablets in Tangqi and Qiaozi villages concerning salt taxes.

[17] On August 18, 1928, during the middle of the night, the previous several days of torrential rain caused a landslide in Qiaozi resulting in the deaths of more than thirty people.

[18] In 1934, a lianbao (associated bao) was created encompassing the inhabitants of the islands of Nangan, Beigan, Daqiu, Xiaoqiu, Gaodeng, Xiyang (西洋) and Dongyong (Dongyin).

On December 12, 1950, Beigan District was established as part of the Matsu Administrative Commission (馬祖行政公署).

[18] On May 17, 1959, Communist guns on the mainland coast fired 112 shells that landed on Beigan (Peikantang) Island according to the Nationalist Defense Ministry.

[20] On October 25, 1967, Chinese Communist shelling at Tangqi Village lead to the death of one nineteen year-old, injury of six others and the destruction of three buildings.

[25] Beigan Township is located approximately 110 nautical miles (200 km) northwest of Taiwan Island.

[26] The population center of Beigan is Tangqi (Tan-chi) village and is the place where major shops and restaurant are located.

With the withdrawal of most of the military forces, the main source of income is now tourism, with several hotels in Tangqi, and numerous B&Bs in Qinbi and Qiaozi.

In August 2018 (Republic of China calendar year 107), Banli Elementary School (坂里國小校) consolidated into Tang Chi Elementary, since the Banli campus became the National Taiwan Ocean University Matsu Campus (國立臺灣海洋大學馬祖校區).

[49] The library of Beigan opens daily from Wednesday to Sundays with the exception of national holidays.

Starting 23 December 2015, there will be direct ferry service between Beigan and Huangqi in Lianjiang County, Fuzhou, Fujian, Mainland China.