Dear XXX,
My name is XXX.I'm writing to you to introduce my family to you.There are four people in my family.They are my father, my mother, my sister and I. My father is a worker in a factory. My mother is a teacher in a middle school. My sister is a primary school student and she is 8 years old. I’m a middle school student and I’m 14 years old.
Look forward to hear from you soon.
Yours
XXX