Still my composition,Who can help me correct the mistake

Still my composition,Who can help me correct the mistake
某国际旅游团游览长城.车抵长城,下车前,你作为导游向大家作必要的交代和介绍.下面使讲话内容；
1世界上最长的城墙,有2000多年历史,世界文化遗产之一
2正值旅游旺季,游客较多,注意安全
3旅游车在入口处等待,记住车号和车颜色
4贵重物品随身携带,下车前关好车窗
5讲话时间为下午1点半,在长城逗留三个半小时,请准时返回
6祝大家玩的愉快
写作要求
1必须用5个句子介绍所给的全部内容
2将五个句子组织成连贯的短文
Ladies and gentlement,
Here we are the foot of the Great Wall,let me tell you something about it,The Great Wall is the most long wall in the world,which has a history of two thousand years,it also is one of the cultural beritage of the world.There are so many tourist come here ,with the high tourist season,so we should look to our own safety.Before getting off the car ,we must take the valuable along,keep the car's windows close ,and then we will wait in the entrace where have the tourist bus,by the way,don;t forget the bus's number and its colour.We will spend three hours in the Great Wall,please come back before 4;30 PM.At last,I hope everybody having a good time.