Below are all the RSS subscription formats supported by the Beginner Forum.
Generally, you just need to add .rss after the link you want to track, such as
https://forum.beginner.center/t/topic/548.rss
https://forum.beginner.center/u/王白水/activity.rss
Full Version
Badges
https://forum.beginner.center/badges/[id]/[badge_name].rss
Categories
https://forum.beginner.center/c/[category_slug]/[id].rss
Groups
Mentions
https://forum.beginner.center/groups/[group_name]/mentions.rss
or
https://forum.beginner.center/g/[group_name]/mentions.rss
Posts
https://forum.beginner.center/groups/[group_name]/posts.rss
or
https://forum.beginner.center/g/[group_name]/posts.rss
Posts
https://forum.beginner.center/posts.rss
Tags
https://forum.beginner.center/tag/[tag_name].rss
Topics
Top topics (by time period, independent of user)
All
https://forum.beginner.center/top/all.rss
Yearly
https://forum.beginner.center/top/yearly.rss
Quarterly
https://forum.beginner.center/top/quarterly.rss
Monthly
https://forum.beginner.center/top/monthly.rss
Daily
https://forum.beginner.center/top/daily.rss
Top topics (for user making the request)
https://forum.beginner.center/top.rss
Latest Topics
https://forum.beginner.center/latest.rss
Single Topic
https://forum.beginner.center/t/[topic_slug]/[id].rss
Users
Posts
https://forum.beginner.center/users/[username]/activity.rss
or
https://forum.beginner.center/u/[username]/activity.rss
Topics
https://forum.beginner.center/users/[username]/activity/topics.rss
or
https://forum.beginner.center/u/[username]/activity/topics.rss