It's entirely political. Do we know how much genomic sequencing say, Mongolia or Tajikistan, are doing, and how transparent their data is? Will travel restrictions subsequently be slapped on people coming from countries that don't stipulate anything on visitors from China?
A total nonsense, as ever. The Chinese Government are vile, but are playground games like this, that won't phase them in the slightest, really worth it for reinforcing the stigmatisation of Chinese people that already exists due to covid? Especially when it will be a short-term measure, yet the stigma will be long-lasting.
The West and associated countries could have chosen to be the bigger person here, but no.