My father once became a Canadian citizen and divorced his mother. I belong to my mother. Now he works in China. I am his son, age 17. Can I immigrate to Canada?

You just need to discuss it with your father. Go to the public security bureau to transfer accounts. Father-son relationship is not separated by parents' divorce. These are two different things. Then go to the notary office to do a notarization (this notarization is in Chinese and English) to prove that you are father and son, and then send the materials to the Consular Department of the Ministry of Foreign Affairs for consular certification. Then do other application materials, it will take a long time anyway. First, discuss with your father, because he is the guarantor who accepted your immigration in the past, which is very important.