答案是:
Dear Tim The Mid-autumn Festival is coming soon,and Iam writing to invite you to apend the festival with my family.It is one of the most important traditional festivals in China.On this special day,people usually try their best to return home to gather with their family.Having a reunion dinner,eating moon cakes,appreciating the full moon together and enjoying some classic Chinese poems are all the traditions of this festival.My mum will set the table wih all kind of delicacy andmy parents both want you to join us that day.We would feel much happier if you can come, Looking forward lo your coming Yours, Li Hua