diff --git a/README.md b/README.md
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+++ b/README.md
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-# collaborative-experts
+# Video-Text Retrieval Embedding with Collaborative Experts
+
+*author: Chen Zhang*
+
+
+<br />
+
+
+
+## Description
+
+This operator extracts features for video or text with [Use What You Have: Video Retrieval Using Representations From Collaborative Experts](https://arxiv.org/pdf/1907.13487v2.pdf).   
+For video encoder, this operator exploits embeddings with different modality information extracted from pre-trained experts models, such as motion, appearance, scene, ASR or OCR.
+For text query encoder, it exploits text embeddings extracted from pre-trained models such as word2vec or GPT.  
+This operator is a collaborative experts model, which aggregates information from these different pre-trained expert models, and output the video embeddings and text embeddings.
+
+
+<br />
+
+
+## Code Example
+
+For video input, load embeddings extracted from different upstream expert networks, such as audio, face, action, RGB, OCR and so on. They can be from upstream operators or from disk .  
+For text query input, load text embeddings extracted from pre-trained models. They can be from upstream operators or from disk .  
+For `ind` input, if a data in one of the modalities is invalid(such as NaN) or you do not want use it, the corresponding value in `ind` is 0, else 1.
+
+
+ *Write the pipeline code*:
+
+```python
+import torch
+from towhee import Entity
+import towhee
+
+torch.manual_seed(42)
+
+batch_size = 8
+experts = {"audio": torch.rand(batch_size, 29, 128),
+           "face": torch.rand(batch_size, 512),
+           "i3d.i3d.0": torch.rand(batch_size, 1024),
+           "imagenet.resnext101_32x48d.0": torch.rand(batch_size, 2048),
+           "imagenet.senet154.0": torch.rand(batch_size, 2048),
+           "ocr": torch.rand(batch_size, 49, 300),
+           "r2p1d.r2p1d-ig65m.0": torch.rand(batch_size, 512),
+           "scene.densenet161.0": torch.rand(batch_size, 2208),
+           "speech": torch.rand(batch_size, 32, 300)
+           }
+ind = {
+    "r2p1d.r2p1d-ig65m.0": torch.ones(batch_size,),
+    "imagenet.senet154.0": torch.ones(batch_size,),
+    "imagenet.resnext101_32x48d.0": torch.ones(batch_size,),
+    "scene.densenet161.0": torch.ones(batch_size,),
+    "audio": torch.ones(batch_size,),
+    "speech": torch.ones(batch_size,),
+    "ocr": torch.randint(low=0, high=2, size=(batch_size,)),
+    "face": torch.randint(low=0, high=2, size=(batch_size,)),
+    "i3d.i3d.0": torch.ones(batch_size,),
+}
+
+text = torch.randn(batch_size, 1, 37, 768)
+
+towhee.dc([Entity(experts=experts, ind=ind, text=text)]) \
+    .video_text_embedding.collaborative_experts[('experts', 'ind', 'text'), ('text_embds', 'vid_embds')]().show()
+```
+
+![](img.png)
+
+
+<br />
+
+
+
+## Factory Constructor
+
+Create the operator via the following factory method
+
+***collaborative_experts(config: Dict = None, weights_path: str = None, device: str = None)***
+
+**Parameters:**
+
+​   ***config:*** *Optional[dict]*
+
+​   Default is None, if None, use the [default config](https://github.com/towhee-io/towhee/blob/a713ea2deaa0273f0b6af28354a36572e8eba604/towhee/models/collaborative_experts/collaborative_experts.py#L1130) the same as these in the original paper and repo, 
+
+​   ***weights_path:*** *Optional[str]*
+
+​   Pretrained model weights path, if None, use the weights in this operator.  
+
+​   ***device:*** *Optional[str]*
+
+​   cpu or cuda.
+
+
+<br />
+
+
+
+## Interface
+
+When video modality, load a video embeddings extracted from different upstream expert networks, such as video, RGB, audio.  
+When text modality, read the text to generate a text embedding. 
+
+
+**Parameters:**
+
+​	***experts:*** *dict*
+
+​  Embeddings extracted from different upstream expert networks, such as audio, face, action, RGB, OCR and so on. They can be from upstream operators or from disk .  	
+
+​	***ind:*** *dict*
+
+​  If a data in one of the modalities is invalid(such as NaN) or you do not want use it, the corresponding value in `ind` is 0, else 1.
+
+​	***text:*** *Tensor*
+
+​  Text embeddings extracted from pre-trained models. They can be from upstream operators or from disk .  
+	
+
+
+
+**Returns:** *numpy.ndarray*
+
+​   Text embeddings and video embeddings. They are both a dict with different modality, the key is the same as input modality, and the value is a tensor with shape (batch size, 768). 
+
+
+
 
diff --git a/__init__.py b/__init__.py
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+++ b/__init__.py
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+# Copyright 2021 Zilliz. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from .collaborative_experts import CollaborativeExperts
+
+
+def collaborative_experts(**kwargs):
+    return CollaborativeExperts(**kwargs)
+
diff --git a/collaborative_experts.py b/collaborative_experts.py
new file mode 100644
index 0000000..032b997
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+++ b/collaborative_experts.py
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+# Copyright 2021 Zilliz. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+from typing import Dict
+
+from pathlib import Path
+from towhee.operator.base import NNOperator
+from towhee import register
+from towhee.models import collaborative_experts
+
+import warnings
+
+warnings.filterwarnings('ignore')
+
+
+@register(output_schema=['vec'])
+class CollaborativeExperts(NNOperator):
+    """
+    CollaborativeExperts embedding operator
+    """
+
+    def __init__(self, config: Dict = None, weights_path: str = None, device: str = None):
+        super().__init__()
+        if weights_path is None:
+            weights_path = str(Path(__file__).parent / 'trained_model.pth')
+        self.ce_net_model = collaborative_experts.create_model(config, weights_path, device)
+
+    def __call__(self, experts, ind, text):
+        out = self.ce_net_model(experts, ind, text)
+        text_embds = {k: v.squeeze(1).detach().cpu().numpy() for k, v in out['text_embds'].items()}
+        vid_embds = {k: v.detach().cpu().numpy() for k, v in out['vid_embds'].items()}
+        return text_embds, vid_embds
+
+    def get_text_embds(self, experts, ind, text):
+        out = self.ce_net_model(experts, ind, text)
+        text_embds = {k: v.squeeze(1).detach().cpu().numpy() for k, v in out['text_embds'].items()}
+        return text_embds
+
+    def get_vid_embds(self, experts, ind, text):
+        out = self.ce_net_model(experts, ind, text)
+        vid_embds = {k: v.detach().cpu().numpy() for k, v in out['vid_embds'].items()}
+        return vid_embds
+
+    def get_cross_view_conf_matrix(self, experts, ind, text):
+        out = self.ce_net_model(experts, ind, text)
+        return out['cross_view_conf_matrix'].detach().cpu().numpy()
+
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diff --git a/requirements.txt b/requirements.txt
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+torch
+towhee.models
+towhee
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