We are 2 travelling adults and want to book a bullet train on May 14,2016 from Beijing to Pingyao. There seem to be tickets on many trains on any day, but no on May 13 and 14 2016. It says all the tickets have been sold out. All the other dates are fine and bookable.
I tried looking for tickets from Beijing to a number of other cities on May 14 as well (just to check), but every train to every destination has 0 tickets available. How is this possible? There are even tickets left on the 7th which is the end of the national holiday week of china.