According to the 2021 Census, there were more than 1.7 million Chinese people residing in Canada.
If 0.00000001% are bad actors then it’s dangerous.
Chinese law says it does not matter if you’re now a citizen of another country. You are not permitted to turn down a request from the government to spy for them. Most people will have sufficient “handles” still in China that can be twisted to ensure cooperation. Even if you don’t have relatives, there’s always force. The CCP is a brutal, totalitarian system. They make the Nazis, and the Soviets look like amateurs.