Lost luggage in Shanghai Hongqiao

Dear TravelChinaGuide-Team,
I left a small piece of luggage on the train from Qingdao to Shanghai Hongqiao. I can't find any contact information for lost luggage in Shanghai Hongqiao Railway Station. Is there any way to get in touch with staff at Shanghai Hongqiao Railway Station except going there again to inquire about my luggage?
Thanks and regards,
Christina