Is it possible to store small luggage in Beijing Capital Airport T2 for 15 days? At what cost?

I checked the information on the official website, and it says that you can put the luggage there for several days. However, I'm not sure whether you can storage for 15 days or not. You'd better dial the service line 010-64598152 to confirm whether you can store it or not, as well as the specific cost. Generally speaking, for one piece of luggage, the fare is CNY 30-100 for 24 hours.