Nope its not in trials its fielded on mass scale at most of the HQ9 sites since 2020.
Chinese offer more things for export than any nation , do you know the there are 4+ FCRs alone available for export with HQ9 with 2 of these being much more advanced than ones in PLA inventory.
Even HQ16 has a newer FCR unveiled in 2018 that has much better capabilities than the older FCR that both PLA & PA use , yet PLA hasn't adopted the new FCR but have offered it for export.
PAF Vera's are old now, for several years now Vera NG has been marketed and has been sold to some ME&A region customer as well. Chinese well far ahead in passive radar tech so don't think they need inputs on Vera.
Chinese have a whole network along the entire coast made up of purely passive radar systems (same passive radar Also exported as part of CHL906 EW system that we purchased
) , and that is in addition to the other various types of passive radars they have in large quantities.