I made a similar product in 2019, first in Japan. At that time, due to tax reasons, the exit cost of buying and selling cryptocurrencies in Japan was very high (55%), which led to the emergence of U-cards. At that time, U-cards were still similar to VISA and Mastercard agent cards, and it was not difficult to obtain them in 2018 and 2019. The business process at that time was: 1. Deposit USDT into the designated address. two