Could someone please point me to a web site with an authoritative schedule for the trains in China?

I can't find anything online or even in print at the train station. When I went to the Shanghai Railway Station and asked about trains to Suzhou, the ticket agent came up with only about a half dozen trains (producing all train numbers from her memory--no actual schedule in sight!), but I'm pretty sure there are trains from Shanghai to Suzhou at least every hour. Maybe I was being given nonstop trains only? (I am fine with a local train, since this is such a short trip, but I couldn't communicate any of this due to not speaking Chinese.)

Thanks for any suggestions!