China says it doesn’t care about Biden’s Olympics derision. Why does it threaten countermeasures?

At home, Chinese officials appear to have prepared for the boycott, emphasizing that China has not personally invited US dignitaries. At a press conference on Friday, Zhao Weidong, Beijing’s deputy head of propaganda, noted that foreign dignitaries were invited by the countries’ Olympic organizing committees, not China.
https://www.washingtonpost.com/world/asia_pacific/china-olympics-boycott/2021/12/07/4310efa0-5704-11ec-8396-5552bef55c3c_story.html?utm_source=rss&utm_medium=referral&utm_campaign=wp_homepage China says it doesn’t care about Biden’s Olympics derision. Why does it threaten countermeasures?