Sorry, I misunderstood what shorthand meant. I thought the question was whether there’s a complex variant, like 一 → 臺 for 零.

I’m an ESL speaker, so please forgive me.

零 is the only character, as far as I know. 一, 二, … are not shorthands; they’re the original characters, while 臺 and other more complex forms are used only in certain situations where necessary.

Hope this is what the questions was about.