1. A method for updating a graphic code database, the method comprising: receiving a graphic code query request for a graphic code; searching product information corresponding to the graphic code in the graphic code database; searching whether the graphic code database includes at least one recommended keyword corresponding to the graphic code in response to a determination that the graphic code database does not include product information corresponding to the graphic code; in response to a determination that the graphic code database includes the at least one recommended keyword: returning one or more recommended keywords to a user device based on the graphic code, and in response to a determination that the graphic code database does not includes the at least one recommended keyword: receiving one recommended keyword from the user device, and associating the one recommended keyword with the graphic code.
1. A method for updating a graphic code database, the method comprising: receiving a graphic code query request for a graphic code; searching product information corresponding to the graphic code in the graphic code database; searching whether the graphic code database includes at least one recommended keyword corresponding to the graphic code in response to a determination that the graphic code database does not include product information corresponding to the graphic code; in response to a determination that the graphic code database includes the at least one recommended keyword: returning one or more recommended keywords to a user device based on the graphic code, and in response to a determination that the graphic code database does not includes the at least one recommended keyword: receiving one recommended keyword from the user device, and associating the one recommended keyword with the graphic code. 9. The method as claimed in claim 1 , further comprising: searching for product information in product information database using a search keyword carried in the search query request; returning the product information based on the searching; determining a click rate of a piece of the returned product information during a given period of time; and determining the product information corresponding to the graphic code based on the click rate of the piece of the returned product information.