Taiwan President Tsai Ing-wen announced on Tuesday that the US is planning on a “cooperation” between its National Guard and Taiwan’s military. The purpose is to deepen security ties between the two despite Chinese refusal.

The US is Taiwan’s most important ally as it had supplied it with arms and offered international support on several occasions. Despite their lack of formal diplomatic relations, the two have been colluding.

Earlier this month, China’s People’s Liberation Army (PLA) announced that it conducted a military exercise in Taiwan's vicinity as a warning against the US-Taiwan "collusion." This came two days after, President Joe Biden's statement that Washington would get involved militarily if China were to try to take the self-ruled island by force.

Despite having stated that the US will not change its policy regarding China, President Joe Biden angered Beijing by appearing to signal a change in the US policy of "strategic ambiguity" on Taiwan. Biden noted a week ago that "We agreed with the One China policy, we signed on to it... but the idea that (Taiwan) can be taken by force is just not appropriate," Biden said in a contradictory statement, as the One China policy states that Taiwan is a part of the sovereign mainland.

"It will dislocate the entire region and be another action similar to what happened in Ukraine."

China called Biden's statement “flirting with danger” and warned the US from doing anything that would overstep Chinese sovereignty.

During a visit by US Senator Tammy Duckworth at her office in Taipei, Tsai noted that Duckworth was a co-sponsor of the Taiwan Partnership Act, which had bipartisan support in Congress but has yet to become law.