add performance radar chart

README.md

@@ -21,8 +21,10 @@ It demonstrates superior performance in benchmarks like MMLU, HumanEval, and MBP
 By comparing CrystalCoder with other similar work, CrystalCoder is quite balance on language and coding tasks.
 
 <center><img src="performance_in_benchmarks.png" alt="performance in benchmarks" /></center>
-<center><img src="performance_in_benchmarks_barchart.png" alt="performance in benchmarks barchart" /></center>
 
+| Performance on Standard Benchmarks             |
+|------------------------------------------------|
+<center><img src="performance_radarchart.png" alt="performance radar chart" /></center>
 
 **Notes**