Why can't Tik Tok send a duplicate card?

Because the person who sent the card has your shared card, your duplicate card can't be sent out.

You can send the copied cards to your friends who haven't collected them yet.

Tik Tok card collection method: open the phone and click the corresponding software. Switch the interface and click the 2 billion icon in the middle of the bottom. Check the card you got, and then click the red card drawing icon below. The interface jumps, and click the open icon at the bottom. View the cards obtained. After collecting the cards, click the composition icon in the middle. Click to increase the number of cards drawn. To view the corresponding tasks, click the red icon on the right. By synthesizing a drill card from release year, finance, China and year, every time you draw a card, you have the opportunity to unlock the drill card directly.