To be fair, zero is a complicated number
Even as a Hongkonger myself, I have no idea. We just see these characters as ancient numbers.
Also, if you write 柒 in an informal context, it is considered offensive.
The character used to refer to a type of tree sap, but shares the same pronounciation as 七. I'm guessing the reason it's considered offensive is because the top component implies ejaculation, but that's something I'd need to check!
Even as a Hongkonger myself, I have no idea. We just see these characters as ancient numbers.
Also, if you write 柒 in an informal context, it is considered offensive.
The character used to refer to a type of tree sap, but shares the same pronounciation as 七. I'm guessing the reason it's considered offensive is because the top component implies ejaculation, but that's something I'd need to check!