So I went to this smallish hotel in a port city in China, and this was the breakfast china they had. The towels and disposable toothbrush and shower cap and other things also had this logo on them. I gave money to a very bemused employee who let me take these home. The toiletry supplies also got brought back (not the towel), but I don’t know where they are now. JSJ stands for Jin San Jiao, or ‘golden triangle(s)’.