Not much, actually. Depending on how many universities you want to apply for, you should generally apply for four universities and give yourself more protection.

To apply for several universities, you should prepare several transcripts (and diplomas)+1. For example, if you want to apply for a university with 10, you should prepare a copy of 1 1 and send ten copies to those ten universities (and one copy to apply for a visa).

Copy and translate the graduation certificate and high school report card, and then get your middle school seal.

good luck