I believe CKT may be related to, or copied from Tonghui. There are a lot of similarities. Just look at the attached screen shot and compare to yours. It is so similar with pretty much the exact same text, menu options, etc - just rearranged and more spread out for the larger screen. In fact that screen shot doesn't show the lighter blue band behind the readings but there is one just like on the Tonghui screen.
Regarding CKT, I hadn't heard of them before buying this unit a couple of years back. I was buying some Tonhgui gear (a TH3321 AC Power Meter and a TH6412 PSU) from an AliExpress seller I often deal with, and was thinking of also buying either the TH2830 like you have, a TH2827C, or the Applent AT3818 [1]. The bundle was starting to get too expensive with shipping, so the seller then suggested the CKT1000 LCR Meter as a cheaper option. I looked at them and found out they could supply a CKT5000 with good specs for my needs and cheaper than a TH2827C.
The CKT LCR came with fixtures just like the Tonghui ones including the tweezers (an extra $100) which look just like the TH28009B ones in your photo from the first post. I had to buy the Tonghui SMT fixture though ($150) as there wasn't a CKT equivalent available. The CKT5000 is bigger and boxier that then Tonghui units (bigger even than some PCs), but that doesn't bother me. It has a nice big screen, and wasn't too difficult to operate without reading the manual. The manual isn't too bad, it is in readable English and gives some useful detail, but it is not as good as Tonghui manuals.
Now, would I buy CKT gear again... probably not if I could afford a Tonghui, Keysight, or Keithley alternative. Maybe if I'm on a budget and willing to live with some rough edges. It seems to work fine, saved me money, and I've not had any specific issues with it. I just feel less trusting of it than any of my other gear, but that could probably be fixed by doing a detailed side-by-side comparison with another brand. It certainly seems better than my handheld LCR meters.
The companies themselves are apparently just a few blocks (1.1km) apart in Xinbei District, Changzhou. Not uncommon, and it means they probably shared some staff. Tonghui have been around longer though. CKT seem to do more in the temperature measuring/calibration market.
TH = Changzhou Tonghui Electronic Co.,Ltd
CKT = Changzhou Chuangkai Electronic Co. Ltd
Oh, and CKT website lists a bunch of Tonghui and Applent/Anbai products including the TH2830 and AT3818. So that is very confusing...
www.cz-ckt.com/pd.jsp?id=239www.cz-ckt.com/pd.jsp?id=273If you have a contact at Tonghui you've been dealing with then maybe you could ask about CKT?
[1] Side note: I have some Applent AT8612 DC Loads which I'm quite happy with. Applent (aka Anbai for Chinese market) are yet another lesser known test equipment manufacturer. Their temperature data loggers seem pretty good, and they seem to have gone to some effort to design their own trade dress and UI although commonalities are still seen like e.g. brackets around titles like "<SETUP>".