Putting a QR code picture in your resume is essentially that you change the picture and pattern of your resume and convert it into PDF, which is basically no problem. However, this practice does not make much sense, because HR will only conduct a preliminary test by telephone first. If the telephone communication is unqualified, it will not add a QR code; If the telephone communication is qualified, HR will naturally add your WeChat according to your contact information, which is a bit redundant.