AVC Championship is a 2022 World Championship qualifier. Of course China will likely qualify by continental ranking but will JLP really risk it?
Last cycle they played with basically the A-team members who were available.
China hasn't sent A team since 2015. Don't think Asian Championships is a priority now since the 4th place historic worst result in 2013. Top 2 teams from continental championships will qualify with top 11 world ranking teams for final spots.