you will be picked up at the Exit A National Agriculture Exhibition Center(Line 10) metro station at 7:30am(recommended to leave at 7:30am cos it will be much less traffic on the way, meanwhile much less tourists on the Great Wall you can avoid the queue for everything and enjoy the view there better but if you don't want to leave too early then it is flexible) in the morning by the driver, he will take you to Mutianyu Great Wall,the driver will help you to purchase tickets for the Great Wall,after that he will tell you how to meet him when you return,this transportation service only including private transportation,nothing else so you need you buy tickets, food ,etc by yourself, you will have about 3 hours on the Great Wall,after that the driver will drop you off at the same point where he pick you up