Huiling king798790: If you lose your mobile phone, you can directly ask the merchant to reissue it. This is the same as the ordinary membership card, except that you can reissue a card exactly like the original card, including the membership number, but the ordinary card can't. Moreover, the loss probability of mobile phones is much smaller than that of ordinary cards.

Back to Niu Wen: As long as there is a networked computer, a QR code reader and a business card printing and issuing software, it is very convenient. It can be made directly by business card printing and card issuing software and sent to member mobile phones. (The software is via MMS)