LangChain HuggingFaceEmbeddings + FAISS
from langchain.embeddings import HuggingFaceEmbeddings
HuggingFaceEmbeddings(model_name='infgrad/stella-base-zh-v2', cache_folder='models/embeddings/')
embeddings = HuggingFaceEmbeddings(model_name='models/embeddings/infgrad_stella-base-zh-v2',
encode_kwargs={'normalize_embeddings': True})