请教为父母美国签证：show purpose of trip

[十步一杀]

有问题请教：从下面网址查到在加拿大为父母申请美国签证的一个要求是提供“Evidence which show the purpose of trip", 我想明年春天某个时间陪父母去美国转转，具体时间未定，那么我该如何提供这个“Evidence"? 多谢了。

http://www.amcits.com/visas.asp#pleasure

DS-156 (application form).
Valid Passport (at least 6 months).
Proof of legal status in Canada: original or certified copy.
One passport-size photo.
Older passports containing previous visas.
Documents substantiating previous legal status in U.S.
US$100 non-refundable application fee.
Reciprocity fee (if applicable).
Proof of sufficient funds to cover all expenses while in the U.S.
Proof of ties/residence in a country outside the U.S. which have no intentions of abandoning.
Evidence which show the purpose of trip.

 

[dxchen_ca]

Just say for trouist purpose. Are your parents Canadian immigrants? if yes, you can apply for multiyears multienter visa and easy to get approved. however, if they are visitors here, you may risk refusal with an excuse that they should apply at US Embassy in Beijing. That's hateful because they do not tell you when you submit the application but just receive your money and then say that sentence.