Update README

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

README.md

@@ -39,19 +39,12 @@ dc.stream(["Hello, world."])
   .show()
 ```
 
-## Factory Constructor
-
-Create the operator via the following factory method
-
-***ops.text_embedding.dpr(model_name)***
-
-
 
 ## Factory Constructor
 
 Create the operator via the following factory method
 
-***text_embedding.dpr(model_name="facebook/dpr-ctx_encoder-single-nq-base")***
+***text_embedding.dpr(model_name="")***
 
 **Parameters:**
 
@@ -59,7 +52,7 @@ Create the operator via the following factory method
 
 ​	The model name in string.
 The default value is "facebook/dpr-ctx_encoder-single-nq-base".
-You can get the list of supported model names by calling `get_model_list` from [auto_transformers.py](https://towhee.io/text-embedding/transformers/src/branch/main/auto_transformers.py).
+You can get the list of supported model names by calling `get_model_list` from [dpr.py](https://towhee.io/text-embedding/dpr/src/branch/main/dpr.py).
 
 
 ## Interface