you must take care of following points before updating any tl entry-
1. for station pictures, "station name" must be visible clearly.
2. for train pictures "train board must be visible clearly.
3. for loco pictures at least "loco number and type" must be visible.
4....
more... for experimental stoppages/news/halt note source must be provided as a proof.
5. for updating timetable we follow this priority fetching from "official site>NTES>IRCTC>manual update.
etc.