The township is known for its natural environment and Eastern Min culture, for the historical Dongyong Lighthouse and for its military importance and history as the northernmost territory of Taiwan.

[25] On the night of November 11, 1931, HMS Petersfield ran ashore on the northern side of Dongyin (Tungyung) with Admiral Howard Kelly, Commander-in-Chief, China aboard.

[25] On February 19, 1955, Nationalist planes mistakenly bombed the island, causing the death of an elderly woman and some property damage.

On May 21, 1985, an attempt by Chinese Communist forces to collect information about Dongyin (Tungyin) by using the hijacked Taiwanese boat Hungchi No 1 (宏志一號) was stopped.

[41] Dongyin Township is an archipelago in the East China Sea off the PRC-administered Loyuan Bay (羅源灣; Lò̤-nguòng-uăng) and is approximately 100.0 nautical miles (185.2 km) from Keelung on Taiwan, with a total area of 4.4 km2.

The township was originally part of the Loyüan County before the ROC government evacuated to Taiwan in 1949 following the Chinese civil war.

[citation needed] The geological formation of Dongyin is closely related to Mainland China, where the granite bedrock was formed by Yanshan Movement (燕山運動) dated to 100 – 200 million years ago.

[citation needed] The coastal line of Dongyin is maternally related to that in Fujian, drowned valleys (谷灣式海岸) of Submergent Coastlines (沈水海岸).

[clarification needed] The bedrock of Dongyin comprises mainly gray granite, characteristic of primitiveness and assorted texture.

The surrounding granite cliffs are connected with sea, waves, rocks, soil, grass, and sky, creating a wide range of colors, including navy blue, white, maize, and jade.

The expanding and steep terrain originated from sea gulfs is the consequence of poor primary permeability of granite and continuous erosion caused by seawater.

Nowadays, at Suicide Cliff, bamboo handrails and observatory are set up, followed with revitalization of old walls on which 'Righteous Virtue High up Sky, Patriotism Echo through Eternity' are inscribed to commemorate her deeds.

Legend has it that the Lins in Ban Ciao became wealthy because of the good Feng Shui of their main living room facing Rat Sands.

Dragon Sea Cave (海現龍闕) is situated in the south of Beiao (北澳), and at the east coastline of Wind Tiger Cape (風虎角).

As of early 2001, up to 50 Tien Chi (Sky Spear) missiles were deployed at two sites: Tungyin Island, and an unidentified second location.

Inside the tunnels are fully equipped with bedrooms, an ammunition depot, Zhongshan room (中山室), bathrooms and even a pigsty.

Enai (恩愛山) and the west of Shaoziao (小紫澳), the straight up huge stone is named Mountain Facing Guanyin (朝山觀音).

The indispensable conditions to produce fine liquor are optimal humidity and temperature, microorganisms for fermentation, and spring water rich in maifanite (麥飯石) granite.

To show their gratitude for the grand construction, the troops and inhabitants on the island built a pavilion on the stack, with a sitting statue of Chiang Ching-kuo inside.

Lack of vast tidal flats in Dongyin, the pebble beach in Dongao is one of few ports that give easy access to the sea.

Out from the observatory, the north is the endless sea, and the west is the Luohanping (Lohan Flat) (羅漢坪), aka Three-Colored Stone (三色石).

Facing Zhongzhu Harbor, the huge stone on the hillside stands erect, as if it were a monk, reading Tipitaka scripture, indifferent to the mundane matters.

The nearby water has an influx of cold and warm ocean currents, creating ideal conditions for both fish and birds: gulls and terns in particular breed on the cliffs of the islands.

Nationalist soldiers stationed on the island following the end of the Chinese civil war in 1949 used the image of the bird on their badges and the Dongyin Distillery (東引酒廠) takes it as a symbol.

Enai (恩愛山) in Dongyin, Dongao (東澳), Qingshuiao (Cingshueiao) (清水澳), and Dragon Boat Sands (龍船沙) in Xiyin (Siyin).

In 2006, Lycoris radiata was elected by the inhabitants 'County Flower', as a replacement for bougainvillea (九重葛) in the martial law enforcement period.

The flowers of Lycoris sprengeri (紅藍石蒜), also named Matsu stone garlic (馬祖石蒜), are pink with a blue tint.

Enai (恩愛山) in Dongyin, Dongao(東澳), Qingshuiao (Cingshueiao) (清水澳), and Dragon Boat Sands (龍船沙) in Xiyin (Siyin).

From July to August, Scilla scilloides can be easily spotted on the open hillsides or fields along the roads in Dongyin and Xiyin (Siyin).

Heteropappus ciliosus is widely distributed at Dongyong Lighthouse (東湧燈塔), Suicide Cliff (烈女義坑) and Houao (后澳).