As far as I know, there are no direct buses from Ningbo to Wuzhen. There are two options: First, take the train at Ningbo South Train Station to get to Jiaxing and then catch the bus at Jiaxing West Bus Station to reach Wuzhen. Or you can catch a bus at Ningbo South Bus Station to Jiaxing and then find a tour bus at Jiaxing West Bus Station to Wuzhen. It takes you about 50 minutes from Jiaxing to Wuzhen.

Second, take a bus at Ningbo South Bus Station to Hangzhou East Bus Station and then catch a bus from Hangzhou to Wuzhen. Or you can take the train to Hangzhou from Ningbo.

See, it is very far from Ningbo to Wuzhen. If you hire a taxi from Ningbo to Wuzhen, I guess that you have to pay a lot of money.