Add readme

Signed-off-by: Kaiyuan Hu <kaiyuan.hu@zilliz.com>

README.md

@@ -1,2 +1,94 @@
 # eqa-search
 
+# Enhanced QA Search
+
+## Description
+
+**Enhanced question-answering** is the process of creating the knowledge base and generating answers with LLMs(large language model), thus preventing illusions. It involves inserting data as knowledge base and querying questions, and **eqa-search** is used to query questions from knowledge base.
+
+
+<br />
+
+
+## Code Example
+
+### **Create pipeline and set the configuration**
+
+> More parameters refer to the Configuration.
+
+```python
+from towhee import AutoPipes, AutoConfig
+
+config = AutoConfig.load_config('eqa-search')
+config.collection_name = 'chatbot'
+
+p = AutoPipes.pipeline('eqa-search', config=config)
+res = p('https://raw.githubusercontent.com/towhee-io/towhee/main/README.md')
+```
+
+
+<br />
+
+
+
+## Enhanced QA Search Config
+
+### Configuration for Sentence Embedding
+
+***model (str):***
+
+The model name in the sentence embedding pipeline, defaults to `'all-MiniLM-L6-v2'`.
+You can refer to the above [Model(s) list ](https://towhee.io/tasks/detail/operator?field_name=Natural-Language-Processing&task_name=Sentence-Embedding)to set the model, some of these models are from [HuggingFace](https://huggingface.co/) (open source), and some are from [OpenAI](https://openai.com/) (not open, required API key).
+
+***openai_api_key (str):***
+
+The api key of openai, default to `None`. 
+This key is required if  the model is from OpenAI, you can check the model provider in the above [Model(s) list](https://towhee.io/sentence-embedding/openai).
+
+***embedding_device (int):***
+
+The number of devices, defaults to `-1`, which means using the CPU. 
+If the setting is not `-1`, the specified GPU device will be used.
+
+### Configuration for [Milvus](https://towhee.io/ann-search/milvus-client)
+
+***host (str):***
+
+Host of Milvus vector database, default is `'127.0.0.1'`.
+
+***port (str):***
+
+Port of Milvus vector database, default is `'19530'`. 
+
+***top_k (int):***
+
+The number of nearest search results, defaults to 5.
+
+***collection_name (str):***
+
+The collection name for Milvus vector database.
+
+***user (str):***
+
+The user name for [Cloud user](https://zilliz.com/cloud), defaults to `None`.
+
+***password (str):***
+
+The user password for [Cloud user](https://zilliz.com/cloud), defaults to `None`.
+
+<br />
+
+
+## Interface
+
+Query a question from Milvus knowledge base.
+
+**Parameters:**
+
+- ***question (str):*** The question to query.
+
+- ***history (List[str]):*** The chat history to provide background information.
+
+**Returns:**
+
+- ***Answer (str):*** The answer to the question.