3 minutes. According to the Changzhou subway network, it takes 3 minutes to get to changzhou railway station by subway from the north of Science and Education Center, and there are 8 stations by subway line 1. Process:

1. First, get on the bus at the north station of Science and Education Center, take subway line 1, and head for the forest park.

2. Next, after 8 stops, get off at Boai Road.

3. Finally, go straight for 54 meters to reach changzhou railway station.