Is it possible to take a long distance bus from Qingdao to Beijing?

I’m sorry that I can’t find the information on their official website. There are lots of bullet trains operating between two places. You can take it at the Main Railway Station. It departs at 07:00, 07:10, 08:18, 09:29, 10:21, 11:26, 12:14, 12;32, 14:30, 16:00, 17:11 and 18:35 with the duration of around 5 hours. The ticket of the first class costs CNY474/person, while the second class costs CNY314/person.