从 加拿大临时签证综述 Canada Temporary Visas 继续讨论：
- 旅游 Visit as a tourist
- 探亲访问（看望子女和孙子女） Visit your children or grandchildren
- 商务访问 Visit on business
- 过境签证 Transit through Canada
持加拿大访问签证（Canada Visit Visa）一次可以在加拿大停留多久？加拿大访问签证有效期问题。
飞出国：一般允许停留6个月，特殊情况下会少于6个月，临时访问签证持有者允许在加拿大停留的时间会在护照上注明。打算延长在加拿大停留时间可以申请延期（extention），延期申请要在签证停留期最少还剩 30 天的时间前在加拿大境内提出申请。
How long can I stay in Canada as a visitor?
A border services officer at the port of entry in Canada will determine how long you can stay in Canada. Most visitors are allowed a six-month stay from the day they entered Canada. If the officer authorizes a stay of less than six months, they will indicate in your passport the date by which you must leave Canada.
If you want to stay longer than your authorized stay, you should apply for an extension at least 30 days before the authorized end of your stay.
New entry requirement now in effect
Visa-exempt foreign nationals need an Electronic Travel Authorization (eTA) to fly to or transit through Canada. Exceptions include U.S. citizens and travellers with a valid Canadian visa. Canadian citizens, including dual citizens, and Canadian permanent residents cannot apply for an eTA.