I was recommended "character decomposition database" on this site.
I have started to explore it and found, that some decompositions I don't understand, like
U+4E0D 不 ⿱一③ U+4E0E 与 ⿹②一[GTKV] ⿻②一[J]
visual representation on my machine
What do these circled numbers mean? Or they are just incorrectly displayed on my machine?