In today's society, QR code payment methods have been widely used in offline micro-payment scenarios such as catering stores, supermarkets, and convenience stores. However, there are still hidden risks in the bar-code generation mechanism and transmission process, and many cases involving payment security risks have also been triggered.
The statement 'Static bar-codes are easy to be tampered with or altered, and easy to carry Trojan or other viruses' can explain the conclusion in the question.