update readme

README.md

@@ -9,6 +9,7 @@ PaddlePALM also provides state-of-the-art general purpose architectures (BERT,ER
 
 ## Package Overview
 
+| module | illustration | 
 | - | - |
 | **paddlepalm** | an open source NLP pretraining and multitask learning framework, built on paddlepaddle. |
 | **paddlepalm.reader** | a collection of elastic task-specific dataset readers. |