The Taiwan Strait Express-1 (TSE-1, also known as Tanshui-Fuzhou Submarine Cable) is the first submarine cable across the Taiwan Strait, linking Tanshui, Taiwan island and Fuzhou, mainland China. The TSE-1 submarine cable is about 270 Km, consists of 8 optical fiber pairs. The design capacity of the TSE-1 submarine cable system is 6.4 Tbps.

The TSE-1 consortium consists of China Unicom, China Telecom and China Mobile from mainland China, and Chuanghwa Telecom, Taiwan Mobile, Far Eastone,and TIGC from Taiwan.

The TSE-1 cable project was completed on January 18, 2013.

Though the TSE-1 is widely toasted as the first submarine cable linking Taiwan island and mainland China, the first submarine optical fibre cable linking Taiwan and mainland China is the Kinmen-Xiamen submarine cable system which was ready for service on August 21, 2012, linking Kinmen island, Taiwan and Xiamen, mainland China.