It seems that your son applied to junior boarding schools and did not get any offer. I am sorry to hear that. As I discover every year, the competition among Chinese students for boarding schools become fiercely competitive. I am sure that your son was one of good candidates, however schools just could not have them all. Since your son is 6th grader, I encourage you not to be stressed out, rather to try to find some alternatives. Your son might go to a good private school (day or public) which has a good record of sending its graduates to top private high schools. Starting and studying early in a good American junior school (6-8), as far as I am concerned, has some definite advantages when your son applies to the private/boarding school later. It is not too late. And you do not have to be discouraged. Or you might seek some advice from education professionals.