Chinese are very good at threats.
They can threaten Japan, Taiwan, Koreas, Phillipnies, Vietnam etc at any time in last two years.
They for the last six months picked on India.
Years back they began the stupid work of stapled Visa. According to them that was not aggravating a dormant problem. They publicly began asserting claim over Arunachal Pradesh. According to them that was not a provocation.
Only if Indian President routinely visits that province, it suddenly becomes a provocation.
Strange diplomacy of the Chinese. It is a gun barrel diplomacy. They are noe overconfident of their military might. They just forget that stolen technology does not make top military grade. And it would be proven sooner than later. Chinese would militarily intercept Japanese or Koren or Taiwanese commercial planes one day. That day, American would take off from Guam and shoot the Chinese copied military fighters. After that Chinese would simmer down. They would turn their tail and run from their newly created Air Zone.
I wish this happen sooner than later, so the world could breath a bit easier.
US should follow this with cutting back on Chinese imports, revisit the Dollar-Yuan relationship and permanently cut back on Chinese capability to make war.