I think Zhu might stay with Vakif for the 2018-2019 season, if they add more key players to help her out. With Gozde retiring, Naz being pregnant and if the rumours of Rasic and Lonneke possibly leaving are true, then the work load will be heavy on Zhu. Hopefully they don't overuse her and risk injury. Maybe she will return to China for the following 2019-2020 season, it would be a smart decision to keep her healthy and get a head start practicing with national team before the Tokyo Olympics since the China season ends earlier.
Vakifbank is the best place for her to work at. I think Langping will require her going back to china in olympic year! Her main target is this year's world championship and 2020 tokyo olympics.