Who can't immigrate to Canada?

According to the standard that Canadian immigrants have the right to refuse entry, people who incite terrorist activities or hatred, sanctioned nationals or corrupt foreign officials may be prohibited from entering Canada. Under what circumstances will the minister's discretion to refuse entry be used? For those who may be refused entry by the minister, the guidelines are divided into two categories: first, those who incite terrorism, violence, hatred and other crimes; Second, foreigners or foreign corrupt officials in some sanctioned countries. The new power allows the Minister of Immigration to ban certain foreigners from entering the country for up to three years based on public interests, but this new power will only be used in very special circumstances.