我09年来美国念PhD，之后出现一些变故没有继续PhD，11年底拿到master毕业。12年2
月份在一家小公司开始上班。中间我一直没有时间回过国，这个肯能会是个弱点。
我父母都在国内小县城的银行工作，工龄20多年，职位也都不低。每人每月固定工资
5000左右，加上年底奖金大概有十万的年收入。这次因为我老爸比较忙，走不开，所以
想让我妈一个人去签证先过来6个星期左右。父母之前都没有出过国。
请大家帮我看看我写的邀请信和准备的材料：
RE: Tourist Visa (B2) Application for XXX
To whom it may concern,
I am writing this letter to invite my Mother, Mrs. XXX, (National ID#:
XXXXXXX) to visit the United States of America for tourism and family
reunion.
I came to the U.S. in September 2009 to pursue my graduate study in the area
of XXXX at XXXX University and graduated with Master of Science degree in
December 2011. I currently work at XXX company as a XXX and hold my F-1
status (Optional Practical Training).
I have not seen my family for more than two years because, during my study
in the U.S., I was busy with studying and working in the lab so that I could
not have a trip to China. We really miss each other. At now, I would like
to invite my Mother (My Father cannot travel at this time because of his
work schedule.) to join me for about six weeks at XXXX. My Mother intends to
arrive at XXX on XXX and leave on XXX. During her stay here, I will host my
Mother at my apartment. I would like to take my Mother to travel around the
City of Chicago, the Great Lakes area, and, if time permitted, to
Washington D.C. My parents and I together will financially support her trip.
My Mother will return to China after her temporary stay here to go back to
her work at XXX Bank of China where she serves as a division director;
moreover, my Mother will need to take care of the family, in which, my
Father and Grand-parents live together.
Your help for her visa application will be greatly appreciated.
Sincerely,
XXXX
准备的材料：
申请人的材料：
1、护照； 2、5厘米X5厘米白色背景签证照片；3、签证申请表电子提交确认页 （在上
面手写注明中文姓名、您中文姓名的电报码、中文家庭地址、公司名字, 地址）；4、
签证申请费收据原件；5、身份证（我爸的名字）；6、户口薄；7、工作证明+工资证明
；6、工资卡流水账单；7、信用卡消费流水账单；8、房产证；9、邀请信；10、派出所
开具的亲属关系证明；11、申请人的请假证明；12、家庭合照；13，申请人的简历
邀请人的材料：
1、护照+F1签证+I94的复印件；2、I20的复印件；3、EAD卡（OPT）的复印件；4、工资
单的复印件；5、Bank Statement的复印件；6、简历
同时我还有个问题：
我是否应当在信中说明我来的时候是打算年PhD，后来转成了Master？
谢谢大家的各种意见！！！
