It has been over a year since the last Xiaomi tablet, so hints of the Xiaomi Mi Pad 4 are coming just in time. The info was dug up by @FunkyHuawei who explores ROM configurations for clues of hardware features. The tablet will be powered by a Snapdragon 660 chipset, according to its build.prop. There's no info on RAM size and the presence of a microSD card is not quite certain. The screen of the tablet will have 320 dpi, though that doesn't tell us much of its size and resolution. Info on the Mi Pad 4 cameras is more certain - there will be a 13 MP OmniVision OV13855 on the back...
Source: https://www.gsmarena.com/possible_xiaomi_mi_pad_4_specs_include_snapdragon_660_chipset-news-30734.php
