When business people meet for the first time, they usually exchange business cards. People who have worked for a few years may have accumulated several thick stacks of business cards, and they might feel that these cards are neither useful to keep nor easy to discard. However, have you ever considered whether using these paper business cards in this digital age is somewhat outdated? It's likely that such electronic business cards will appear one day, or perhaps other products with similar functions will emerge. In fact, some smartphones already have the capability to directly exchange electronic business cards, though it’s uncertain how practical they are. In the future, every business person might own an electronic business card as common as everyone now owns a mobile phone. When two people meet, they would only need to take out their electronic business cards, and their information could be transferred to each other's devices via Bluetooth, eliminating the need to exchange paper cards. This approach would be both environmentally friendly and convenient.