【正文】
a under independent visa program and havent seen my parents and sister for a long time, we missed them very much. Even though we really want to e back to see them its not so easy for us to spare time. It is a pity that my parents might not be able to visit us due to their age and health situation. So, my wife Xuan and I would like to invite my dear sister to visit us. The purpose of the visit is family reunion. She will stay with us at the