We can add wireless charging to the Xiaomi Mi Mix 2s' list of improvements over the Mi Mix 2. The feature has been tipped by Xiaomi itself, via its official Weibo account. Xiaomi is yet to release a phone with wireless charging, but hopefully this is a sign of things to come and all of its upcoming flagship devices join the trend. The Xiaomi Mi Mix 2 will be announced in Shanghai on March 27. It will have a 5.99-inch display (that will likely sport a notch), a Snapdragon 845 and a dual camera on the back.
Source: https://www.gsmarena.com/xiaomi_mi_mix_2s_will_have_wireless_charging-news-30012.php
