Apple is currently believed to bring back the iPhone SE in 2020. According to some leaks, this phone is thought to take on the iPhone 8's form factor, so as to offer a smaller screen than has become usual. Now, Xiaomi is reportedly thinking of doing something very similar with the popular Mi 6.
https://www.notebookcheck.net/Xiaomi-weighs-up-answering-the-iPhone-SE-2-with-a-Mi-6-refresh.458949.0.html