Are you Chinese to give us an answer? From what I see any chinese city or province uses 2-letter combos. Other words also need 2 letters like zx, kj, jr, sj. That simply means that each combo perhaps has its own meaing or meanings and this make 4L.com for chinese as easy to make acronyms for chinese companies like 2L.com for US and other western companies.
there are 400 possible chinese combos. Would be nice to understand all 400 combos meanings. We know small. I can't find this imformation.
For example I took list of 208 chinese cities and applied rules of how bj, sh, sx, sc and other combos are created and made list of combos
Then I added some known to me acronyms, provinces and we have 155 unique combos that do have meanings. So there are only 245 combos which meanings may not exist. But I think all combos have some meaings.
Now only imagine how easy npkj.com suits technology company located in Nanping - small chinese city with 2 millions people. what about imaginary npgl.com? We don't know what gl is. Perhaps it means factory, or medicine, or circus, or newspaper or anything else.
My note is only to those who tell that these chips don't have endusers because it's difficult to imagine company that may use acronym xyzn or trqk or qlzy... Yes, it is impossible to imagine in English, but in Chinese it is perhaps easier than imagine a company that can use acronym FHBA, VCDI, LMSE, DGFO, etc, etc, etc...
Would be good idea to know how chinese company websites create their acronyms with english letters.
company = ??
corporation = ??
business = ??
laboratories = ??
center = ??
services = ??
financial cervises = ??
bank = ??
group = ??
laser = ??
electronic = ??
digital = ??
visual = ??
visual reality = ??
drone = ??
marketing = ??
office = ??
tractors = ??
vehicles = ??
etc, etc, etc...
I think that each of 400 combos has its meaning