TAIPEI, Taiwan (AFP) — Taiwan's President Tsai Ing-wen announced on Tuesday an extension in mandatory military service from four months to one year, saying the island needs to prepare for the increasing threat from China.

"The current four-month military service is not enough to meet the fast and ever-changing situation," she told a news conference. "We have decided to restore the one-year military service from 2024."

Self-ruled, democratic Taiwan lives under the constant threat of invasion by China, which considers the island a part of its territory, to be taken one day, by force if necessary.

Beijing's saber-rattling has intensified in recent years under President Xi Jinping, and Russia's invasion of Ukraine deepened fears in Taiwan that China might move similarly to annex the island.

Tsai's made the announcement following a high-level meeting on national security, the semi-official Central News Agency said.

The presidential office said Monday that a proposal to "adjust the structure" of national defense was on the agenda, without providing details.

CNA said the change would come into effect in January 2024 if the formal notice of extension is issued next month.

Mandatory service used to be deeply unpopular in Taiwan — once a brutal military dictatorship that has since morphed into a progressive democracy.

Its previous government had reduced compulsory military service from one year to four months with the aim of creating a mainly volunteer force.

But recent polling showed more than three-quarters of the Taiwanese public now believes that is too short.

Taiwan has stepped up reservist training and increased its purchases of warplanes and anti-ship missiles to bolster its defences. But experts have said that is not enough.

The national security meeting in Taipei on Tuesday comes two days after Chinese military exercises near Taiwan, which were held in response to what Beijing described as "provocations" and "collusion" between Washington and Taipei.