The reason? They're home to cheap and plentiful merchandise that are blatant rip-offs of famous branded items, like the Longchamp "Pliage" tote, RayBan aviators, and even Coach wallets.
Tourists can risk buying the usual bootleg DVDs of movies or chance their arms with Apple products that are clearly fake.
And while we don't condone buying fake designer products,these images collected by YouTube user dj0c91 of blatant Chinese knock-offs are hilarious, to say the least. 
Some of them we think got lost in translation, some of them are pure rip-offs of North American and European brands, and some of them — "Pizza Huh"? — well, we don't really know.