The Chinese made Marbles slipjoints and fixed blades are most/very likely made by the same people that make Rough Rider, Bucks, Indian Head, Colt etc... (See SMKW)
You will notice that many/most are identical to RR and I remember some of the fixed blades that would come with RR boxes and Marbles on the blade a few months ago
So, though I do not have any of their slipjoints, the quality is considered generally very good, similar to RR etc..
Choose whichever brand you want to buy.