My wife and myself are planning to travel by train D21 Beijing to Qinhuangdao on the 25th of October 2010. Have a look around Qinhuangdao and then travel to Dalian on T225/228 overnight. Do you think we would have any problems buying tickets for these two trains 4 days prior to traveling from the Beijing railway station at this time of year? (Would buy soft seat d21 & soft sleeper T225/228 soft seat d21 & soft sleeper T225/228)