Earlier quoted context omitted.
what is the leader/follower pattern? Something like master/slave approach?
Leader/Follower is actually something entirely different, but the linked chinese document talks about a master/client approach. Sadly, in the past years, due to some political movements, the term "master/slave" has been declared problematic, and GitHub actively warns that projects using such language can and will be excluded from the service. There have been previous discussions about this on HN.
There was actually a huge debate about this on Reddit caused by Swift merging a rename change PR into master. The Swift team was so excited about the change for some reason that they didn't even run tests before the merge...