Dear Li Ming,
I am going to have a trip to the Great wall in Beijing,我想去北京参观长城and I want to invite you to go with me我希望你可以和我一起去.Please note we will leave at 8 am next Monday morning,我准备在下周一早上八点出发 and will will take a train到时候我们坐货车去.We will return on next Friday我们会在下周五回来.So if you want to go with me,just call me directly如果你想去的话可以直接给我打电话告诉我.