The ZTE brand Nubia has reportedly registered a new device called the NX667J. This new leak has led to speculation that it is a premium-grade phone called the Z30, not the least because it has been certified to use top-end 120 watt (W) charging. It might thus be combined with under-display camera technology in this potential upcoming flagship.
https://www.notebookcheck.net/A-potential-Nubia-Z30-passes-through-3C-testing-with-120W-fast-charging.536589.0.html