Update README.md

README.md

@@ -17,6 +17,8 @@ This repository contains **Llama-3-Chinese-8B-Instruct-v2-GGUF** (llama.cpp/olla
 
 Further details (performance, usage, etc.) should refer to GitHub project page: https://github.com/ymcui/Chinese-LLaMA-Alpaca-3
 
+*Note: PPL for v2 models are higher than v1, as the v2's base model (Meta-Llama-3-8B-Instruct) also has a larger PPL than v1's (Meta-Llama-3-8B).*
+
 ## Performance
 
 Metric: PPL, lower is better