Update README

Signed-off-by: shiyu22 <shiyu.chen@zilliz.com>

README.md

@@ -1,2 +1,100 @@
-# milvus
+# Operator: ANN Insert: Milvus
 
+*author: shiyu*
+
+<br />
+
+
+
+## Desription
+
+Insert data into Milvus collections. **Please make sure you have [created Milvus Collection](https://milvus.io/docs/v2.0.x/create_collection.md) 
+and connected Milvus before loading the data.**
+
+<br />
+
+
+
+## Code Example
+
+### Get the Collection first
+
+```python
+from pymilvus import Collection, connections
+
+connections.connect(host='localhost', port='19530')
+collection = Collection('your_collection_name')
+```
+
+### Example
+
+*Write the pipeline in simplified style:*
+
+```python
+import towhee
+
+towhee.dc(your_embeddings) \
+    .ann_insert.milvus(collection=collection)
+```
+
+*Write a same pipeline with explicit inputs/outputs name specifications:*
+
+```python
+import towhee
+
+towhee.dc['vec'](your_embeddings) \
+    .ann_insert.milvus['vec', 'results'](collection=collection) \
+    .show()
+```
+
+<img src="./result.png" height="150px"/>
+
+### Load Collection
+
+> Please load the Collection after inserted data.
+
+```python
+collection.load()
+```
+
+<br />
+
+
+
+## Factory Constructor
+
+Create the operator via the following factory method:
+
+***ann_insert.milvus(collection)***
+
+<br />
+
+
+
+
+**Parameters:**
+
+***collection:*** *str* or *pymilvus.Collection*
+
+The collection name or pymilvus.Collection in Milvus.
+
+
+<br />
+
+
+
+## Interface
+
+**Parameters:**
+
+***data:*** *list*
+
+The embedding data to be inserted.
+
+<br />
+
+
+
+**Returns:** *mr*
+
+Return milvus results with `milvus.insert`.