update: complete dataset card

README.md

@@ -199,7 +199,7 @@ For full access, request permission via the **Request access** button, then use
 
 Only a subset of the dataset is publicly available here. If you need **full access** to the entire 1000-hour dataset, please scan the QR code below to contact us via WeChat:
 
-<img src="assets/cs.jpg" width="50%" alt="alt text">
+<img src="assets/cs.jpg" width="30%" alt="alt text">
 
 Alternatively, you can click the **"Request access"** button on the right side of this page to automatically gain download permissions for the complete dataset.  
 *Note: Approval is automatic, but we kindly ask you to provide your contact information for licensing purposes.*