Hello, we are planning to go to the yellow mountains from October 2 and leave October 5.

Unfortunately, there are no trains available back to Beijing. We thought of taking a train early in the morning to Shanghai, and then a train from Shanghai to Beijing the same day.
Do you think this would be possible?
Also, is there a bus going very early from Tangkou to Huangshan North Railway station, so we could get a train 7.08 am ?
Thanks!