China Development Bank (xx Branch):
I am a big X student in xx College of xx University, and now I would like to make the following explanation on my study at school and the reasons for renewing my loan:
Studying at school: in study ... when finishing school ... in life. ......
Reasons for renewing the loan: ..... Last school year, I applied for a student loan from your bank, which helped me a lot. Because my family's financial conditions can't pay my tuition for the next academic year, I hereby apply for a student loan from your bank. I hope your bank will approve it.
I am here to convey
Salute!
XXX
Date, year and month