Update README.md

speechx/examples/ds2_ol/aishell/README.md

 # Aishell - Deepspeech2 Streaming
 
-## CTC Prefix Beam Search w/o LM
+## How to run
+
+```
+bash run.sh
+```
+
+## Results
+
+### CTC Prefix Beam Search w/o LM
 
 ```
 Overall -> 16.14 % N=104612 C=88190 S=16110 D=312 I=465
@@ -8,7 +16,7 @@ Mandarin -> 16.14 % N=104612 C=88190 S=16110 D=312 I=465
 Other -> 0.00 % N=0 C=0 S=0 D=0 I=0
 ```
 
-## CTC Prefix Beam Search w/ LM
+### CTC Prefix Beam Search w/ LM
 
 LM: zh_giga.no_cna_cmn.prune01244.klm
 ```
@@ -17,7 +25,7 @@ Mandarin -> 7.86 % N=104768 C=96865 S=7573 D=330 I=327
 Other -> 0.00 % N=0 C=0 S=0 D=0 I=0
 ```
 
-## CTC WFST
+### CTC WFST
 
 LM: [aishell train](http://paddlespeech.bj.bcebos.com/speechx/examples/ds2_ol/aishell/aishell_graph.zip)
 --acoustic_scale=1.2