Pointless unless you ban flights from everywhere. The virus is still circulating everywhere and a potential new variant with an evolutionary advantage will also be everywhere in no time unless everyone bans flights from China.

The virus variants circulating in China (BF.7 and BA.5.2) are actually not as problematic for us as the ones circulating in the US and Europe for example (BQ.1 and XXB) because we've all been exposed to them in summer already..