This is known from leaked promo photos on Weibo website. There is a Chinese male artist showing off Xiaomi 5X phone.
From the photo a lot of information features are contained. We can see the new Xiaomi whiz carry two cameras on the back. It is said that according to the news circulating the size of the camera sensor is 12 MP each.
This company made by Lai Jun makes 5X mobile phone with metal body. In addition they pinned the fingerprint sensor on the back. Not to forget, Xiaomi 5X will certainly run MIUI 9 based on Android Nougat.
Previously reported, Xiaomi 5X will be powered Snapdragon 625. 5.5 inch screen with 1080p resolution.