It is reported , the glasses trade service quality in Nanjing and regulation (try out ) of " three guarantees " have been already issued recently, offer city to be trade and business office competent to in charge of place , city industrial and commercial bureau is it protect place , city Department of Qulity Supervision ,etc. department put on record to disappear, it is hopeful to implement formally next year. Three packs of trade regulations that this involves glasses firstly in Nanjing.