For more:
https://news.cgtn.com/news/2022-12-14/China-launches-second-COVID-19-booster-shot-1fLb1VitTdC/index.html

China will offer a second COVID-19 booster dose to certain groups who received their first booster shot more than six months. The targeting groups are people with a high risk of infection, elderly aged over 60, people with serious underlying health conditions and those with low immunity.

Given the progress in vaccine development, all COVID-19 vaccines that have got conditional market approval or been greenlighted for emergency use can be used as a second booster dose.

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