Update Readme

Signed-off-by: Jael Gu <mengjia.gu@zilliz.com>

README.md

@@ -17,18 +17,24 @@ This operator is implemented with pre-trained models from [Huggingface Transform
 Use the pre-trained model 'distilbert-base-cased'
 to generate a text embedding for the sentence "Hello, world.".
 
-*Write the pipeline*:
+*Write a same pipeline with explicit inputs/outputs name specifications:*
 
+- **option 1 (towhee>=0.9.0):**
 ```python
-import towhee
+from towhee.dc2 import pipe, ops, DataCollection
 
-(
-    towhee.dc(["Hello, world."])
-          .text_embedding.transformers(model_name="distilbert-base-cased")
+p = (
+    pipe.input('text')
+        .map('text', 'vec', ops.text_embedding.transformers(model_name='distilbert-base-cased'))
+        .output('text', 'vec')
 )
+
+DataCollection(p('Hello, world.')).show()
 ```
 
-*Write a same pipeline with explicit inputs/outputs name specifications:*
+<img src="./result.png" width="800px"/>
+
+- **option 2:**
 
 ```python
 import towhee
@@ -40,8 +46,6 @@ import towhee
 )
 ```
 
-<img src="./result.png" width="800px"/>
-
 <br />
 
 ## Factory Constructor