假如你是李明，7月20日要放暑假了，你打算邀请你的好友小刚一起去北京游玩，请写一封邀请信，说明你的旅行计划，并约定好时间和地点。

字数：100--200字之间，要写的流畅，注意时态和语法知识。

reference: be going to, have a trip, start on July 25, visit , the Great Wall, the Palace Museum, Tian’an Men Square, take photos, Beijing food, Would you like…? If you like to go,  …

Dear Xiao Gang,

    I hope all is going well. Our colorful summer vacation is coming.___________________________________________________________________________________________________________________________________________________________________________

Hope you come soon!

Yours,

Li Ming