WEBTaiwan Strait. / 24.81111°N 119.92833°E / 24.81111; 119.92833. The Taiwan Strait is a 180-kilometer (110 mi; 97 nmi)-wide strait separating the island of Taiwan and Asian continent. The strait is part of the South China Sea and connects to the East China Sea to the north. The narrowest part is 130 km (81 mi; 70 nmi) wide.