Letter of invitation-邀请信-飞出国
Letter of invitation：加拿大境内的人员发出的信件，目的在于帮助朋友或者家庭成员访问加拿大。该信件需说明他们计划如何帮助访问者并且是否有经济能力在一个长期的访问期间资助他们。
A letter from a person in Canada on behalf of a friend or family member who wants to visit. This may be helpful if the visitor is from a country where visas are required to travel to and enter Canada.
The letter should explain how they plan to help the visitor and whether they have the financial means to support the person during a longer visit.