Two methods:
by bus: please go to Ningbo South Bus Station, there are six buses departing to Huzhou everyday, respectively at 07:35, 09:00, 11:05, 12:45, 14:15 and 16:00. The fare is 94RMB.

by train: also 6 trains leave from Ningbo Railway Station to Huzhou South Railway Station everyday. The duration is about 4.5 hours. Well, please refer to the train details at https://www.travelchinaguide.com/china-trains/