That’s true, I was looking at rates in the elderly, only about half of over 80s are fully vaccinated, and very few people have had booster jabs. Combined with the low effectiveness of Sinovac and the reluctance of the authorities to use foreign vaccines, and there are still significant risks.
This does not seem to be supported by the data. China's vaccination rate is 88.95%, the 7th highest in the world.
https://coronavirus.jhu.edu/vaccines/international