The bus from Shijiazhuang to Hengshui takes bus No.55 at the railway station, opposite Hualian, and ends at Baifo Bus Terminal, or takes bus No.21at Monument, which also ends at Baifo Bus Terminal. There are buses to Hengshui, taking the national highway, Iveco and Yaxing Small Class. I suggest you don't take the national highway, which is very slow. It takes two hours to go to Hengshui by expressway.