This is why we have scanners to speed up counting paper ballots. And paper ballots are retained for targeted manual counts if there's a need for auditing or recounts.
It is true that some places use much more complex systems and I don’t really understand the interest in those. It definitely don’t see any benefit to fully electronic voting, block-chain or otherwise. Voting doesn’t have to be efficient. It needs to be reliable, understandable, and believable.
If you want to avoid such shenanigans, you'll need to enforce voter privacy.
正 is the tally mark https://en.wiktionary.org/wiki/%E6%AD%A3
I have like a 1-2 year old's level of Mandarin at this point, sigh, but I don't think there is a detail I'm missing once the process gets going. This is a good, accessible voting system.