On the renaming of Canadian immigrants

When you submit your immigration application, you still apply under the official name of China, but when your immigration is approved (when you land for the first time), the immigration officer will ask you if you still use this name in Canada. At that time, you have the right to change your legal name. If you don't change it at that time, you must submit a name change application to the government with the help of a lawyer after living in Canada for one year.

You changed your name in Canada, but it doesn't affect your name and entry and exit passport in China. If you need to change your name in China, you should go to the agency to change it.