Can i deposit my luggage in Guangzhou Baiyun Airport for one week? How much?

Yes, you can. The service hours are from 06:00 to 22:00. For one piece of luggage, the fare is CNY 20 to 55 for 24 hours. If luggages store more than 24 hours, the fare will be accumulated according to the price list. For more details, you can look through the official website of the airport. It has its own English version. You can find the price list there. :)