June 14 news, MIUI ops "MIUI Android Q Notice on upgrading adaptation plans" in the forum.
Currently planned adaptation models have 9 millet, red rice K20 Pro, 8 millet, millet 8 transparent exploration version, millet 8 fingerprint screen version, millet MIX 2S, millet MIX 3, red rice K20, red rice Note 7, red rice Note 7 Pro and millet 9 SE and so on.
Where red rice and red rice Note 7 Note 7 Pro is expected in 2019 Q1 beta (Developer Edition), other models are expected in 2019 Q4 closed beta. 
Millet announced plans to adapt Android Q: closed beta is expected in 2019 Q4
MIUI official said, these are already or will soon begin adapting adaptation Android Q model information, test time is the estimated time, the relevant models outgoing test of time are subject to change, will be updated to inform, so stay tuned (if Google Android Q plans change, we will adjust). 
It should be noted that this announcement fit all models in the large version of the Android beta release, developers will continue to maintain the beta version delayed at least six months. Other models of adaptation work is still debugging and flighting, stay tuned for more adaptation plan follow-up forum announcement.