The RedMagic 6R is nominally a powerful gaming smartphone with Snapdragon 888, 144 Hz AMOLED display and shoulder buttons. High-end equipment rounds off the total package for less than 500 Euros (~$588). Sounds like a bargain, but it is not only the cooling that causes problems in the test.
https://www.notebookcheck.net/Nubia-RedMagic-6R-smartphone-review-Gaming-with-144-Hz-and-hot-fingers.553775.0.html