@Xkaha If they want to help you get settled in Canada
They don’t need a written authorization from IRCC to travel with you, but they must have an essential (non-discretionary) reason for travel.

Essential reasons for travel are either:

You’re a minor child and you need a family member to
travel with you
help you meet your guardian in Canada, and
get set up in your new home
You aren’t a minor child, but you have supporting documents that prove you need a family member with you to get settled. For example, you have a physical or mental condition and you need help getting settled. In this case, you’d submit a medical note as proof.
In either case, only 1 immediate family member will be able to travel with you to Canada.

不太能全部都看懂，但好像是说现在政策允许新生入境了。谢谢你啊

Essential reasons for travel are either:

You’re a minor child and you need a family member to
travel with you
help you meet your guardian in Canada, and
get set up in your new home
You aren’t a minor child, but you have supporting documents that prove you need a family member with you to get settled. For example, you have a physical or mental condition and you need help getting settled. In this case, you’d submit a medical note as proof.
In either case, only 1 immediate family member will be able to travel with you to Canada.