Taiwan has launched its first domestically developed submarine that it hopes will enhance deterrence against the Chinese military.

Taiwan's President Tsai Ing-wen named the vessel "Hai Kun" at a launch ceremony in the southern city of Kaohsiung on Thursday. Construction of the submarine began in 2020.

Tsai said that a domestically built submarine is more than just a goal and is the concrete realization of Taiwan's resolution to protect itself.

She said submarines are important equipment for what she called the navy's "asymmetric warfare" capabilities.

Tsai's administration has been pushing the strategy of having highly mobile capabilities to deter pressure from China's massive military force.

Her remarks come as China is increasing its military activities, including aircraft carrier drills, in the waters around Taiwan.

The names of chief or deputy representatives of liaison offices of the United States, South Korea and Japan were mentioned at the ceremony, indicating the countries provided some form of support for building the submarine.

The firm that built the submarine has not disclosed details of the vessel's capabilities. The submarine was partially covered for the ceremony. Media crews were not allowed to take photos at close range.

The Hai Kun is expected to go into commission in 2025 after tests at ports and at sea.