Posted the image from Channing. I cannot translate it via OCR at that resolution. My guess is that only the "gilded" (as he put it in his e-mail) switch is still made (I've asked).
The "gilded" (AK-CN2 (2)) version has the same metal parts as Xiang Min KSB-C and KSB-N, while KSB-LE has the same metal parts as the other Hua-Jie type depicted (AK-CN2). Xiang Min have never answered my questions as to why they labelled their sample bags with both companies' part numbers, nor have either company offered any insight into why the metal parts are the same now, and seemingly in the past.
Considering that Xiang Min and Hua-Jie use the same metal parts but different plastics (including the numbering), some switches may remain of unknown origin.
I am not convinced they work together. Too many differences in the plastic parts that would be pointless if they were the same assembly line.