Update README.md

README.md

@@ -15,15 +15,15 @@ Read more details about Sailor2 at https://sailorllm.github.io/blog/sailor2.
 
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-<details>
+<details open>
   <summary>
     <b><font size="+1">🔱 Sailor2 Models</font></b>
   </summary>
   
   - [GitHub](https://github.com/sail-sg/sailor2): All you need to know about using or fine-tuning Sailor2.
-  - [Sailor2-1B](https://huggingface.co/sail/Sailor2-1B): 1B base model continually pre-trained on 500B tokens from Qwen2.5-0.5B.
-  - [Sailor2-8B](https://huggingface.co/sail/Sailor2-8B): 8B base model continually pre-trained on 500B tokens from Qwen2.5-7B.
-  - [Sailor2-20B](https://huggingface.co/sail/Sailor2-20B): 20B base model continually pre-trained on 500B tokens from Qwen2.5-14B.
+  - [Sailor2-1B](https://huggingface.co/sail/Sailor2-1B): 1B base model continually pre-trained on 500B tokens from Qwen2.5-0.5B with model expansion.
+  - [Sailor2-8B](https://huggingface.co/sail/Sailor2-8B): 8B base model continually pre-trained on 500B tokens from Qwen2.5-7B with model expansion.
+  - [Sailor2-20B](https://huggingface.co/sail/Sailor2-20B): 20B base model continually pre-trained on 500B tokens from Qwen2.5-14B with model expansion.
   - [Sailor2-1B-Chat](https://huggingface.co/sail/Sailor2-1B-Chat): 1B chat model after post-training on the 1B base model.
   - [Sailor2-8B-Chat](https://huggingface.co/sail/Sailor2-8B-Chat): 8B chat model after post-training on the 8B base model.
   - [Sailor2-20B-Chat](https://huggingface.co/sail/Sailor2-20B-Chat): 20B chat model after post-training on the 20B base model.