A spokesperson for China's foreign ministry said Beijing would take "all necessary measures" and warned the U.S. that Taiwan is "a red line that must not be crossed," Reuters reported. The aid package totals $571 million.

China has warned the US that sending weapons to Taiwan is akin to “playing with fire” and risks severe consequences. The US recently announced $571.3m (£473m) in military assistance to the island and approved $295m in arms sales.