The Xiaomi Mi Mix 3 is set to be announced by Xiaomi on October 25 where it will announce a successor to the Xiaomi Mi Mi 2 (and 2S). Given the imaging ability that we saw on the Mi Mix 2S, we are expecting to see a very capable shooter on the Mi Mix 3. A new camera sample allegedly shot with the Mi Mix 3 was posted to Weibo, a Chinese social media network to tease the smartphone's low-light capabilities. The photo below shows a very nice capture of details in lower light conditions and a nice blend of colors. Zooming all the way in, we can tell there was definitely some post-processing...
Source: https://www.gsmarena.com/xiaomi_teases_mix_3_night_shot_camera_sample_ahead_of_launch_event-news-33878.php