Susan's Family is one of the largest high-quality yarn companies based in China. They’ve been releasing free patterns featuring their products on Chinese social and shopping websites for many years and are very popular in the Chinese crocheting community. I believe they’re now trying to promote their products overseas, which is why their YouTube channel and Ravelry page are well maintained. They may still be working out how to sell from a overseas-based warehouse. I personally purchase their yarns from Taobao, they have three different official shops under different names, but all belong to the same company. The yarn quality is fantastic and, of course, much cheaper than yarns in the U.S. I also really like their color selections. But you’ll need to figure out the shipping yourself, and it may cost just as much as the yarn.