Can you use a domestic international credit card issued in China to refuel in Canada? Do you have to use a chip card? Can a magnetic stripe card be used ?

Magnetic strip cards are not allowed, chip cards are required.

Some gas stations do not accept international credit cards. When refueling, you can also not use a credit card. Just go to the service counter and say it. Generally, they will ask you to refuel first, and then pay directly at the counter. The service counter has networked monitoring for each fuel pump.

Magnetic stripes can also be used, but they are just a little more inconvenient.

I was using a magnetic stripe one, which was not convenient. Later, I paid in cash at the counter.