What is the route from Changzhou, Jiangsu to Changchun, Jilin?

You can choose to take the train. There are two buses in Changzhou every day. Generally, you can take a direct bus to Changchun. The lower berth of the ticket is around 430 yuan, and the whole journey takes 26 hours.

If you fly from Shanghai, it is about 1000 yuan. (Northeast routes are generally not discounted) It is the cheapest flight ticket in Shanghai, around 300 yuan (but tickets must be booked in advance). Changchun airport is far from downtown Changchun, but there are airport buses during the day. Not at night.