https://www.techradar.com/news/xiaomi-mi-band-4-launch-date-set-for-june-11

The Xiaomi Mi Band 4 is set to be officially unveiled very soon as it will make its debut at an event in China on June 11.

That has now been confirmed by Xiaomi, and it's likely to be the same time that we hear about the upcoming Amazfit Verge 2.