Hi my brother,
How are you? How is your study at the primary school? I have been studying at high school far away from for 3 months now, so I miss you very much.
I hope you are fine and work hard at school. Our parents tell me that you are very obidient and help our mother with housework a lot. I am very pleased to hear that. Remember not to eat too much sweets and soft drinks and not to stay up late to play games. Keep your health and take care of our parents, will you?
Write to me soon.
Love
Your sister