参考：
https://github.com/langchain-ai/langchain/issues/18285
https://api.python.langchain.com/en/latest/vectorstores/langchain_community.vectorstores.faiss.FAISS.html#langchain_community.vectorstores.faiss.FAISS

1、保存save_local

import pandas as pd
### 向量
from langchain_community.embeddings import HuggingFaceEmbeddings

embeddings = HuggingFaceEmbeddings(model_name=r"E:\text_model",