The OPPO Find X3 and X3 Pro are hotly-anticipated smartphones as they are touted to combine the highest-end of Android specs in 2021 with arguably iPhone-like looks. A Weibo tipster has uploaded what looks like an official poster from the OEM that contains their launch date information. Should this leak prove accurate, the event in question might also introduce Lite and Neo variants for the new line.
https://www.notebookcheck.net/The-OPPO-Find-X3-series-will-launch-on-March-11-2021.525648.0.html