US senators took a military aircraft to Taiwan to announce vaccine donation. To Beijing, that is a major provocation
https://edition.cnn.com/2021/06/07/china/us-senators-taiwan-china-reaction-intl-mic-hnk/index.html
China should recognize it as imports from US to China through Taiwan to save lives in Taiwan and to obey political correctness about Taiwan at the same time.
But, China seems to stick to giving domestically invented vaccine to Taiwan.