please guide me how to go from shanghai airport to ningbo city after 10 pm

According to your arrival time, there is neither bus nor train to Ningbo. So you can just start off next morning.

There is no direct long-distance bus at the airport. If in Pudong Airport, you need to take airport shuttle bus line 1 to Hongqiao Railway Station. Then take the train to Ningbo directly. Or you can take airport shuttle bue line 5 to the Railway Station. Then walk to the General Bus Station to take a direct bus to Ningbo.

If in Hongqiao Airport, you can walk through a special pass to Hongqiao Railway Station to catch the train. Or just use subway line 10 to pass one station to arrive.