Okay, let me tell rest of it.
Ruyan owns both First Union(RN brand) and Sailebao(DSE brand) factories as well as Dekang. Sailebao gave up when Ruyan threatened to drag them to court. There is no need for suppliers to apply for FDA approval because, well, Ruyan's application will cover both of these brands and thus most of the e-cigs available. The Ruyan you have seen selling classy products is just a cover-up, they own the industry. And the patent in question is Patent Login . They of course want to get rid of every other e-cig manufacturer so they can claim their monopoly. Getting FDA to "ban" e-cigs surely suits them. Especially they dislike Loongtotem for coming up with a vastly superior atomizer design that does not conflict with their patents. On a side kick, Ruyan has started selling 42mg carts in China.