Hmm so this is a strange thing with china and magic chips… CUID is meaningless as to whether it means gen1a or gen2… those terms aren’t even anything manufacturera are typically aware of… they are terms I believe were developed by the proxmark community actually.
So, this may be a gen2 card. You will have to use the standard block write commands to know for sure, or the MCT app for Android, to see if you can change the UID