There are four railway stations in Beijing, including Beijing Station, West Station, South Station (at Yongdingmen Gate) and North Station (at Xizhimen Gate). D305 and D301 both start from Beijing Station. You can go to Beijing Railway Station by subway or by Buses No.44, 9, 10, 103, 104, 713, 1, 4 and 20. Really, D305 has no soft spleeper. But the D trains are usually very comfortable. At the same time, due to high price of the ticket, few people choose them. So, I think it's not crowded in the train.