My parents B2 will be expired in one month, 我正在写给签证官的信是应该以父母的语气写，还是我的？父母不懂英文。是以他们的语气写，他们在上面签字？
另外，如果延期的申请递上去了，在等待期间，before to get any response from CIS,父母就回去了( that means they don't use the extension). If after parents leave US, we get the denial letter, 这会影响他们下次的签证吗？中信银行还能代签ma?
I was planning to apply GC for them, but my income is not enough. So I am trying to find a job during one month, if I succeed, I will apply for GC, and keep their status legal before submit the documents, that's why I need extension for them. If I am fail, I will let them leave in one month.
Parents are getting old, going to interview to get visa at Beijing is like a torture to them. I just want to make it easier for them to come next time.
Either GC or 中信银行代签 is my goal.
叩谢 All your answers and suggestions!