:wave: Hey @ducbui279 - You can use the Guru Card Link URL to reference to other Guru cards instead of the card link in your directory. Example of HTML:
```https://app.getguru.com/card/cp6oRGxi/Card-Title" target="_top">Card Title Here```
oh gotcha! I thought the card from another collection already existed. Can you explain the use case a bit more here? Does the other collection already exist?