We are preparing for PR documents to apply next Jan. I heard from some friends that if you attach a personal letter in your document, express yourself and tell them how you want to become a SPR, maybe your change to get approval is higher. I am not sure it help or not but I think it's not a harm if we do that, so I am thinking about how to prepare this letter

Anyone in this forum have done this before or have any experience please share with me. Following is some of my information:
Race: Vienamese
Salary: $7000
Industry: Construction
Married with wife and daughter.
Thanks and hope to have your feedback soon!!!