First of all, you two are close to Shanghai. How to go to Shanghai together is a problem. Most Nantong people have to change trains in Nanjing to go to Shanghai. Then I suggest your classmates go to Yangzhou first, and you two can go directly from Yangzhou to Shanghai. Find a youth hostel for one night and get up in the morning to watch the World Expo.

First of all, your classmate takes this bus to Yangzhou. You buy two tickets from Yangzhou to Shanghai and wait for him.

K8453/K8456 Nantong-Yangzhou 08:48- 1 1:35 Air conditioning is 2 hours and 47 minutes faster 183 km.

You both go to Shanghai at the same time.

T7785/T7788 Yangzhou-Shanghai 12:20- 17:33 Air-conditioned express train 5 hours 13 minutes 4 16 kilometers.

I slowly sorted out this route. If you are not satisfied, contact me directly at Baidu Hi, and I will change it for you ~ ~