In the upcoming Xiaomi Mi 9 and Mi Mix 4, three rear cameras will be used, according to a GF Securities of Hong Kong research note. In their report on Xiaomi market performance, analysts said that Mi 9 will be the first smartphone with a triple rear camera.
In addition, Mi Mix 4 will obviously have a periscope lens, which allows you to increase the optical zoom without taking up more space in the chassis (at least on the thickness axis).
It is expected that both the Mi 9 and Mi Mix 4 will work on Qualcomm's Snapdragon 855, which is certainly not surprising, considering that these two will be Xiaomi's flagships in 2019. Mix 4 may have a folding screen, but supposedly it wasn’t decided yet. While the 5G version of Mi Mix 3 will be the first 5G Xiaomi phone, Mi 9 can also have an iteration of 5G.
Source (in Chinese) | Via