Update README.md

README.md

@@ -22,5 +22,8 @@ V4：类似于V3，在V2的基础上增强了细节和光影效果; Similar to V
 <br>
 
 Sample Images:
-Model card sample images
-![](./Model_card_sample_images/V4nature.png)
+V4<br>
+![](./images/V4nature.png)
+![](./images/V4City.png)
+![](./images/V4Character.png)
+![](./images/V4weapon.png)