I mean, that's fairly common for a DPOS like system where blocks are forged...

So all of a sudden link is working for English Whitepaper:

https://www.achain.com/Achain_tech_white_paper_translate.pdf

https://www.achain.com/Achain_business_white_paper_translate.pdf

Amongst other things, I like the focus of security and bug finding on the smart contracts, a problem that Ethereum has faced occasionally from bad contract code being exploited.  Like the modularity in the consensus mechanisms too.