According to the law of China, if one parent is from China, a child born in China can automatically acquire China nationality, and can of course register. However, if both parents are foreign nationals, even if the child was born in China, he can't acquire China nationality (it's hard to say whether to add nationality or not). If you want to register in China, you must apply as a foreigner. Of course, you have to prepare the relevant documents of your child in advance, which is more troublesome. You must first find out whether Canadian law recognizes your child as a Canadian citizen, and then go to Canada to go through the relevant formalities. It would be even more troublesome if Canadian law requires children to be present to read these documents. You have to find a way to take a child out of China without any identification, or you will come to a dead end. So you two can either go to Canada to give birth or apply for China citizenship in advance, so that you can get a hukou after giving birth in China, and you don't have to worry about so many documents and legal provisions if you want to become Canadian citizens in the future.