Dear Sir, Madam,
We want to take the night train from Shanghai to Beijing, but wonder about the very short differences in departure time between D308 - D306 - D302 - D314 - D322. What is the difference between those trains? There seem to be not much difference in route? And they all have the same traveling time? Why have only the D-308 first class seats?

Will the T104 and T110 will be more comfortable, as they have lesser stops? I mean: will they be less noisy? Is there a big difference in the soft sleeper seats between a D-train and a T-train?
We have traveled from Beijing to Jinan and the seats were very comfortable in the first class. That was also a D-train, so can we expect the same kind of seats in the D-trains to and from Shanghai? And how about the T-trains? Will it be possible to make a kind of 'stopover' at Suzhou (Jiangsu)? I mean if we take the D-30 or the 1462 train in the morning and want to spend the afternoon and evening in Suzhou, will we have to buy 2 different tickets? Or can we reserve 2 different times to travel to Suzhou and to Beijing with 1 ticket?

I hope anyone can help us with these questions.
Thanks.