Xiaomi's official Chinese Weibo account has issued a teaser indicating that it is prepping an update to its 12.5-inch Mi Notebook Air. The teaser shows a scale with the current weight of the device at 1.07 kg hinting at either a refresh or that the company is targeting a sub 1 kg weight target.
https://www.notebookcheck.net/Xiaomi-Mi-Notebook-Air-sequel-teased-for-March-26.414972.0.html