Static QR codes are always valid. Static QR codes are created once and remain valid without any changes. There is no expiration period for validity in static QR codes. Dynamic QR codes are also always valid. Because dynamic QR codes are paid, if they are not paid, they expire and become valid again once they are renewed. You can get detailed information on the lifespan of QR codes, how to keep them always active, and how to prevent them from expiring by referring to the topic "Do QR codes expire?"