diff --git a/README.md b/README.md
index a692b19..42c1394 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 *author: Kyle He*
 
+<br />
 
 ## Desription
 
@@ -22,12 +23,14 @@ length, making it easy to process documents of thousands of tokens or longer[2].
 
 [2].https://arxiv.org/pdf/2004.05150.pdf
 
+<br />
+
 ## Code Example
 
 Use the pretrained model "facebook/dpr-ctx_encoder-single-nq-base"
 to generate a text embedding for the sentence "Hello, world.". 
 
- *Write the pipeline*:
+*Write the pipeline*:
 
 ```python
 from towhee import dc
@@ -38,6 +41,8 @@ dc.stream(["Hello, world."]) \
   .to_list()
 ```
 
+<br />
+
 ## Factory Constructor
 
 Create the operator via the following factory method
@@ -46,12 +51,13 @@ Create the operator via the following factory method
 
 **Parameters:**
 
-​	***model_name***: *str*
+***model_name***: *str*
 
-​	The model name in string.
+The model name in string.
 The default value is "allenai/longformer-base-4096".
 You can get the list of supported model names by calling `get_model_list` from [longformer.py](https://towhee.io/text-embedding/longformer/src/branch/main/longformer.py).
 
+<br />
 
 ## Interface
 
@@ -61,10 +67,9 @@ and then return text embedding in ndarray.
 
 **Parameters:**
 
-​	***text***: *str*
-
-​	The text in string.
+***text***: *str*
 
+The text in string.
 
 
 **Returns**: