This is incorrect because “your” is already a possessive pronoun, and there’s no point in adding another apostrophe+s.
It has been brought to my attention that “Your” could be somebody’s last name. That would be unlikely, however, especially considering this photo was taken in an Asian-dominated district of LA.
The restaurant does not taste like emperors.
They are trying to convey that the restaurant’s foods have taste “worthy of an emperor”, or “fit for an emperor”.
They’re not selling quality — the products they sell are quality products. You can’t sell somebody the quality of “quality”, I’m sorry.
They sell “banners” — plural.
It’s a convenience store. Convenience stores are indeed convenient, but we call them “convenience stores”. It also seems to be a rather uncreative name for a convenience store: “Convenient Store”.
This store you’ve probably seen a hundred times because it’s in Arcadia, and everybody who did this EC probably took a picture of it, haha.
I actually took many more photos than this; see the photobucket gallery I uploaded them to: