Because Zhangjiakou is expected to open the high-speed rail on December 30, the train to Zhangjiakou will only be sold until December 29. It is estimated that tickets for tickets after December 30 will be sold at the same time as the high-speed rail ticket. <br/>Since Z179 passes through Zhangjiakou, tickets for tickets after December 30th are temporarily not on sale. If you must take the Z179, please continue to wait patiently. Or consider taking the Z69 instead.