This property defines the Unicodes which belongs to Kangxi Radicals block
Characters like ⼀,⼁,⼂, etc. are listed under Kangxi Radicals Block.
215 Characters are present in Kangxi Radicals Block starting with the Unicode point U+2F00 that represents the character ⼀.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.