With Lime Card, membership operators can easily issue a “DID membership card” that proves membership, and members who have received a membership card can use QR code or NFC identification to provide services such as authentication, door opening and closing, attendance authentication, waiting ticket reservation, and easy remittance. Available. Rhyme refers to the widespread use of repeated meter in poetry and lyrics. Starting with the issuance of the first Lime Card, the value is that anyone can easily participate in the popularization of blockchain technology at any time.