・ Product information Size ｜ length and width of about 3.4cm, thickness of about 5mm Material ｜ Stabilizer ·Precautions 1 ｜ It is used in the same way as a general card, not a leisure card, chip card, or student card. 2 ｜ There is no balance in the card and no deposit is required. You must add value before use. 3 ｜ A card outer code will be attached with the product, and U-BIKE can be rented. 4 ｜ If you want to replace it with a question mark hook (lobster clasp), please leave a message in the note. 5 ｜ Here is the "Card Card Charm | Stable Wood" store, [Youyou Card] Please go to: https://www.pinkoi.com/product/F3E2hisi 6 ｜ For additional laser engraving services, please go to: https://www.pinkoi.com/product/VgMZ2apB ・ How to check card number The internal code and verification code of the card can be queried using 7-11 ibon: 1 ｜ In the ibon main menu, select "Life Services". 2 ｜ Select "Electronic Invoice". 3 ｜ Select "Ministry of Finance Electronic Invoice Integration Service Platform". 4 ｜ Select "Vehicle Account Application". 5 ｜ Select "One Card".