Don't be late.
Don't be late for the interview, bring materials that can answer the visa officer's doubts.
Face the visa officer confidently
Face the visa officer with confidence, sincere eye contact, and evasiveness will make the visa officer feel that you are avoiding. In addition, don't wear exaggerated jewelry, don't make up, and wear simple and generous clothes.
Speak slowly and be good at listening.
Learn to slow down, be good at listening, but be quick enough to respond. Some interviewees want to behave well or impress the visa officer, so they speak faster, but it may give the impression that the visa officer doesn't understand or thinks you are eager to succeed.