From Renqiu to Cangzhou, there is a bus at the state-run station, but it is too far away to be convenient. You can take a bus from the West Ring Road (the only way), or you can take a bus at Water Conservancy Bureau, Transportation Bureau, Qiaotou Road, Baoding Road and Huayou Shopping Plaza. It is better to take a state-owned bus. Some cars transfer from Hejian to Cangzhou, and some cars transfer from xian county to Cangzhou. There are quite a lot of cars, every 20 to 30 minutes. General 15 yuan is enough. I have, but I don't think it will take an hour and a half (maybe by sports car). If you are in a hurry, you'd better calculate the time on the road, and the plan can't keep up with the changes.