Mike , shall we book two tickets online ?   Fine . Shanghai and Beijing are thousands of miles away . How about bullet train ? Faster and relatively cheap , I think .   Yeah . How many tickets remain ?   Oh , what a shame . Only sleeping cars have tickets . Others are all out of stock . The price of the sleeping car is almost the same as the airplane.You see , the discount plane tickets are no more than 500 yuan . A good deal , isn't it ? 