Taiwan Strait

Former names of the Taiwan Strait include the Formosa Strait or Strait of Formosa, from a dated name for Taiwan; the Strait of Fokien or Fujian, from the Chinese province forming the strait's western shore;[2] and the Black Ditch, a calque of the strait's name in Hokkien and Hakka.

The Taiwan Strait is the body of water separating Fujian Province from Taiwan Island. Current international agreement does not define the Taiwan Strait but places its waters within the South China Sea, whose northern limit runs from Cape Fugui (the northernmost point on Taiwan Island) to Niushan Island to the southernmost point of Pingtan Island and thence westward along the parallel 25° 24′ N. to the coast of Fujian Province.[3] The still-unapproved draft for a new edition of the IHO's Limits of Oceans and Seas does precisely define the Taiwan Strait, classifying it as part of the North Pacific Ocean.[4] It makes the Taiwan Strait a body of water between the East and South China Seas and delimits it:[5]

On the North: A line joining the coast of China (25° 42′ N - 119° 36′ E) eastward to Xiang Cape (25° 40′ N - 119° 47′ 10″ E), the northern extremity of Haitan Island, and thence to Fugui Cape (25° 17′ 45″ N - 121° 32′ 30″ E), the northern extremity of Taiwan Island (the common limit with the East China Sea, see 7.3).

On the East: From Fugui Cape southward, along the western coast of Taiwan Island, to Eluan Cape (21° 53′ 45″ N - 120° 51′ 30″ E), the southern extremity of this island.

On the South: A line joining Eluan Cape northwestward, along the southern banks of Nanao Island, to the southeastern extremity of this island (23° 23′ 35″ N - 117° 07′ 15″ E); thence westward, along the southern coast of Nanao Island, to Changshan Head (23° 25′ 50″ N - 116° 56′ 25″ E), the western extremity of this island; and thence a line joining Changshan Head westward to the mouth of the Hanjiang River (23° 27′ 30″ N - 116° 52′ E), on the coast of China (the common limit with the South China Sea, see 6.1).

On the West: From the mouth of Hanjiang River northeastward, along the coast of China, to position 25° 42′ N - 119° 36′ E.

The entire strait is on Asia's continental shelf. It is almost entirely less than 150 m (490 ft) deep, with a short ravine of that depth off the south-west coast of Taiwan. As such, there are many islands in the strait. The largest and most important islands off the Fujianese coast are Xiamen, Gulangyu, Pingtan (the "Haitan" of the IHO delineation), Kinmen, and Matsu. The first three are controlled by the PRC; the last two by the ROC. Within the strait lie the Penghu or Pescadores, also controlled by the ROC. There is a major underwater bank 40–60 km (25–37 mi) north of the Penghu Islands.[6]

All of Fujian Province's rivers except the Ting run into the Taiwan Strait. The largest two are the Min and the Jiulong.

Distributions of rivers in Taiwan and their annual sediment loads

The Taiwan strait appeared at the start of the current warmer period.

The Strait mostly separated the Han culture of the Chinese mainland from Taiwan Island's aborigines for millennia, although the Hakka and Hoklo traded and migrated across it. European explorers, principally the Spanish and Dutch, also took advantage of the strait to establish forward bases for trade with the mainland during the Ming; the bases were also used for raiding both the Chinese coast and the trading ships of rival countries.

Widespread Chinese migration across the strait began in the late Ming. During the Qing conquest, Zheng Chenggong (Koxinga) expelled the Dutch and established the Kingdom of Tungning in 1661, planning to launch a reconquest of the mainland in the name of the Southern Ming branches of the old imperial dynasty. Dorgon and the Kangxi Emperor were able to consolidate their control over southern mainland China; Koxinga found himself limited to raiding across the strait. His grandson Zheng Keshuang surrendered to the Qing after his admiral lost the 1683 Battle of the Penghu Islands in the middle of the strait.

Japan seized the Penghu Islands during the First Sino-Japanese War and gained control of Taiwan at its conclusion in 1895. Control of the eastern half of the strait was used to establish control of the southern Chinese coast during the Second World War. The strait protected Japanese bases and industry on Taiwan from Chinese attack and sabotage, but aerial warfare reached the island by 1943. The 1944 Formosa Air Battle gave the United States Pacific Fleet air supremacy from its carrier groups and Philippine bases; subsequently, bombing was continuous until Japan's surrender in 1945. The rapid advance of the Communist PLA in 1949 provoked the government's retreat across the Taiwan Strait.

Fishermen have used the strait as a fishing resource since time immemorial. In the modern world, it hosts major shipping lanes. In the early 2020s Chinese vessels had been illegally dredging sand on the Taiwanese half of the strait. [12]

Taiwan is building major wind farms in the strait.[13]