The friction between China and Taiwan is the worst in the last 40 years and this happened because dozens of warplanes flew into Taiwan's air defense zone. China has always been in the mood of taking over Taiwan and turning it into the Chinese mainland. For the past few days, the tension between the two nations has been very high.
Watching this tension from far away, America’s current President Joe Biden said in an interview, US will help Taiwan defend itself against China. Although, the US has no official diplomatic ties with Taiwan but sells arms to it as part of its Taiwan Relations Act, which states that the US must provide the island with the means to defend itself.