Taiwan on Thursday demonstrated its sea defences against a potential Chinese attack as tensions rise with Beijing, part of a multitiered strategy to deter an invasion from the mainland.

The island’s navy highlighted its Kuang Hua VI fast attack missile boats and Tuo Chiang-class corvettes in waters near Taiwan’s largest port of Kaohsiung, a major hub for international trade considered key to resupplying Chinese forces should they establish a beachhead on the island.

The Kuang Hua VI boats, with a crew of 19, carry

indigenously developed Hsiung Feng II anti-ship missiles and displayed their ability to take to the sea in an emergency to intercept enemy ships about to cross the 44-kilometer (24-nautical mile) limit of Taiwan’s contiguous zone,

within which governments are permitted to take defensive action.

China routinely sends ships and planes to challenge Taiwan’s

willingness and ability to counter intruders, prompting Taiwan to scramble jets, activate missile systems and dispatch warships. Taiwan demanded on Wednesday that China end its ongoing military activity in nearby waters, which it said is undermining peace and stability in the Taiwan Strait and disrupting international shipping and trade.

Mountainous Taiwan’s strategy is to counter the much larger Chinese military with a relatively flexible defense that can prevent Chinese troops from crossing the strait.

Landing sites are few on Taiwan’s west coast facing China, forcing Beijing to focus on the east coast.

Hsiao Shun-ming, captain of a Tuo Chiang-class corvette, said his ship’s relatively small size still allows it to “deliver a formidable competitive power” against larger Chinese ships.