Dear Prof. Choi

It is my great pleasure to receive your reply ,but terribly sorry for my late reply ,hope that wouldn’t affect your arrangement.

SRE实战 互联网时代守护先锋，助力企业售后服务体系运筹帷幄！一键直达领取阿里云限量特价优惠。

I learned from the Kuan Bing yesterday that Certificate of Parental relations is necessary. My mother has no household registration information,so I may not be able to provide proof of my mother's relationship.

According to this situation, is there any other document that can replace this certificate or Could I submission family relationship certificate with only father and borther?

I hope I can break through this problem and looking forward to studying in your lab very much.

I am looking forward to your reply.

Have a good day~

Best Regards
Chen Fei

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