Do you refer to Yanzhou city in Shandong province? If yes, it is around 650km from Beijing. No flights are available from Beijing to Yanzhou. But many trains are operating on the route. And it takes only around 4hrs by train D31. From Beijing airport, you could take the airport bus to the train station first and then take a train to Yanzhou. For train schedule and ticket price, you can check in the form on the page for details.