Dear John,We are going camping on Yulong mountain this weekend.Welcome to our group!I'm Li Hua ,a member of the Student Union of our school .I'm glad to invite you to take part in our camping.There are six persons in our group,and we will gather together at Trian Station Squre at 8:30 on Saturday.The trian will start at 9:30 and arrive there at 11:30 am.We will arrange some activities ,such as singing,dancing and game playing.We will return on Sunday afternoon.In order to have a good time,every member of our group must prepare necessities by yourself,such as tent,sleeping bag,coat,water,food,and so on.If you accpet our invitation,it will be our big pleasure !Not only can we enjoy some wonderful activities ,but also we can conmmunicate each other to improve our English level .We are looking forward to your arrival!Yours,Li Hua