Many questions why some Chinese lives in US for 30 years refused to obtain their US citizenships perceived as not smart! With the changes of time, it appears to be a smart choice today. 許多問為什麼有些中國人在美國生活長達 30 年拒絕申請美國公民身份被認為不聰明！ 時過境遷，在今天看來是個明智的選擇.