Jiri won't be fighting Ankalaev next. He won't get the third fight vs Pereira either, despite Pereira saying he would fight him. His next fight is likely either Dominick Reyes or, again, this Zhang young prospect. Likewise, the guy who Zhang defeated in one round KO was in a 6 wins streak and had never been KO'd, either. He was the first one to KO him.
Btw the promotion is very big on Zhang. Dana White said he likes a lot and sees him as an up and comer talent that is very, very promising. Alex had talked about him, as well, earlier. The matchmakers were all in for him fighting Jiri Prochazka... It can be a similar scenario to Jiri vs Reyes, but with Zhang being Jiri Prochazka in this case...