Well, they sell it with a ZTTO Z12 chain, so you won't need a flat top chain judging by that...
So would ot be fair to assume that it also works with standard Shimano/YBN/KMC road chains? If so, that would be a big advantage over Sram cassette.
Also, question to Aliexpress gurus: are there any Kocevlo integrated handlebars with -6° stem and 75mm reach that would be a ailable in 380/110?
The only bar that seems to fit is the Alanera copy (available without fake logos), Rpantahi is close, but specs are confusing (specs printed on the bar indicate 75mm reach 125 drop, specs in the description indicate 77mm reach and 127mm drop and the identical Kocevlo bars are -10°).