What is the Chinese Homophonic Group?
Chinese writing works differently, of course, to alphabetical writing.


If you define the basic unit of written Chinese as the character, then no Chinese character will equal 1, because there's no such thing as a silent Chinese character.*
If you define the basic unit of written Chinese as a stroke, then the homophonic group is trivial and is just the group comprising all strokes.
If you define the basic unit of written Chinese as all unicode-encoded decompositions (this is not a natural way of decomposing the written language), then non-1-value characters can be found by searching through a database for characters which aren't part of any other character. Examples can be found by Googling search terms like "CJKV Characters with the most strokes".


*I suppose if you wish to reduce expressions like "Aaaaah! (啊啊啊啊!)" then you could plausibly say that 啊 = 1...