So u mean it’s at the discretion of visa office?
Guess u wanna prepare documents needed in advance, the list could vary from office to office, and I'm giving u mine FOR REFERENCE ONLY: (Plz ingnore Hukou if your VO is not HKVO, and u'd be well-advised not to submit your spouse's medical until IRCC asks u to)
From principal applicant:
Generic Application Form for Canada (IMM0008).................................................................Page 2
Additional Family Information (IMM5406).............................................................................Page9
From principal applicant and spouse:
Relationship Information Form (IMM5532)............................................................................Page10
From spouse:
Additional Family Information (IMM5406)............................................................................Page17
Schedule A (IMM5669)with personal history and addresses since age 18............................Page 18
Original police certificate(notarised).....................................................................................Page 24
One recent photo( passport-size,50mm*70mm)..........................................................................Page27
Original birth certificate(notarised)........................................................................................Page 28
Marriage certificate(notarised)...............................................................................................Page31
Notarised Hukou(translation included)..................................................................................Page 39
Copy of the bio-data page of passport...................................................................................Page 49
Copy of Receipt of Application fee and Right of Permanent Residence Fee( RPRF)...............Page50
Medical Examination Information Sheet.................................................................................Page51
Proof of relationship...............................................................................................Page53