There are quite a few MIC DE blades, Mingshi, Rimei, YingJili, 3 different Baili ones, quite a few Gillette ones (Super Blue, Goal Platinum, Super Nacet, Gillette Wilkinson Sword), and Flying Eagle, who seem to have been around for a while. There are also lots of fakes being produced in China as well. No idea how many different factories there are, but I think I read somewhere the new Gillette made London Bridge is the same blade as the Carbon Steel Flying Eagle, which they said is one of the worst blades they have ever used, but the other Gillette MIC blades are supposed to all be very good.
I've used a few MIC blades - Rimei Platinum, Gillette Wilkinson Sword, Baili Blue, and most recently the SuperShave X. I've only used the one blade so far and it was superb for the 1st shave in a Fat Handle Tech, but the next 2 weren't as smooth in the same razor. I will try the blade in a slightly more efficient razor next time around.