"I'm talking to him about it. We had a good conversation, and we'll make a determination pretty soon," Trump said, adding that he has a "good relationship" with the Chinese leader, whose country claims the self-ruled island of Taiwan as its territory.

In a phone call with Trump on February 4, Xi called for "mutual respect" in relations with the United States, while warning Washington about arms sales to the democratic island.

"The Taiwan question is the most important issue in China-US relations... The US must handle arms sales to Taiwan with caution," Xi said, according to China's state broadcaster.

Trump and Xi are due to meet in Beijing in April.

China's Communist Party has never ruled Taiwan, but Beijing claims the island of 23 million people is part of its territory and has not ruled out the use of force to annex it.

The United States does not officially recognize Taiwan, but Washington is Taipei's main security backer -- although the tone of that support has softened slightly under Trump.

The United States approved $11 billion worth of arms to Taiwan in December, Taipei said.

Shortly thereafter, China launched major live-fire drills to simulate a blockade around Taiwan's key ports.

Taiwan's foreign ministry said Tuesday it closely monitors "US-China interactions and maintains good communication with the US side."

"Taiwan firmly believes that only by continuously strengthening its self-defense capabilities can it safeguard its hard-won peace and prosperity," the ministry said in a statement, vowing to continue to "strengthen cooperation with the US."

While Trump has adopted a softer tone on support for Taiwan in his second term, the issue remains a thorn in US-China relations.

On Saturday, Beijing's top diplomat Wang Yi warned the United States against "plotting" on Taiwan, saying it could lead to a "confrontation" with China.

Speaking at the Munich Security Conference in Germany, Foreign Minister Wang said that in the future, the United States could adopt a China policy that involves "instigating and plotting to split China through Taiwan, crossing China's red line."

Taiwan has spent many billions of dollars upgrading its military in the past decade, but faces growing US pressure to do more to protect itself against China.

Taiwan's President Lai Ching-te has proposed $40 billion in extra defense spending by his government over eight years, but the plan has been blocked by the opposition-controlled parliament 10 times since early December.

On Thursday, dozens of US lawmakers urged Taiwan's opposition political parties to end their blocking of the move.

In an exclusive interview with AFP last week, President Lai said he was confident the defense budget would be passed.

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