hi dear, strech marks are caused due to breakdown of collagen
. in dermatology we have creams as well as lasers for this. i will tell u about both.
creams like opexa, hexilak do help a lot but they take long time. however they have very less side effects.
LASERS act very fast but there may be side effects like pigmentation.
so what i suggest is get few sittings of laser done and then continue with creams.
regarding chinese scrubs, sorry to say dear i have no idea