我给父母办理移民，递交到北京，现在移民局出了一封信要提供一些材料，请朋友们帮忙，这个是要提供什么的？
非常感谢！
They also want to have an original reference letter with English translation, issued by local residency committee or public security bureau, listing the total number your children with details of their names and dates of birth.