diff --git a/Readme.md b/Readme.md
index f59a0d9..71a6782 100644
--- a/Readme.md
+++ b/Readme.md
@@ -2,7 +2,7 @@
  * @Date: 2021-01-13 20:32:12
  * @Author: Qing Shuai
  * @LastEditors: Qing Shuai
- * @LastEditTime: 2021-06-14 16:41:00
+ * @LastEditTime: 2021-06-28 11:13:59
  * @FilePath: /EasyMocapRelease/Readme.md
 -->
 
@@ -59,13 +59,13 @@ This is the basic code for fitting SMPL[1]/SMPL+H[2]/SMPL-X[3]/MANO[2] model to
     <sup>Internet videos of Roger Federer's serving<sup/>
 </div>
 
-### Multiple views of multiple people (Coming soon)
+### Multiple views of multiple people
 
 [![report](https://img.shields.io/badge/CVPR20-mvpose-red)](https://arxiv.org/pdf/1901.04111.pdf) [![quickstart](https://img.shields.io/badge/quickstart-green)](./doc/todo.md)
 
 <div align="center">
-    <img src="doc/imocap/mvpose.gif" width="80%"><br/>
-    <sup>Captured with 4 consumer cameras<sup/>
+    <img src="doc/assets/mvmp1f.gif" width="80%"><br/>
+    <sup>Captured with 8 consumer cameras<sup/>
 </div>
 
 ### Novel view synthesis from sparse views
@@ -88,6 +88,7 @@ This is the basic code for fitting SMPL[1]/SMPL+H[2]/SMPL-X[3]/MANO[2] model to
 
 ## Updates
 
+- 06/28/2021: The **Multi-view Multi-person** part is released!
 - 06/10/2021: The **real-time 3D visualization** part is released!
 - 04/11/2021: The calibration tool and the annotator are released.
 - 04/11/2021: **Mirrored-Human** part is released.
diff --git a/apps/vis/vis_client.py b/apps/vis/vis_client.py
index 08e12e3..2893f66 100644
--- a/apps/vis/vis_client.py
+++ b/apps/vis/vis_client.py
@@ -2,9 +2,10 @@
   @ Date: 2021-05-24 18:57:48
   @ Author: Qing Shuai
   @ LastEditors: Qing Shuai
-  @ LastEditTime: 2021-06-04 16:43:00
+  @ LastEditTime: 2021-06-28 11:30:45
   @ FilePath: /EasyMocapRelease/apps/vis/vis_client.py
 '''
+from easymocap.mytools.reader import read_smpl
 import socket
 import time
 from easymocap.socket.base_client import BaseSocketClient
@@ -12,35 +13,48 @@ import os
 
 def send_rand(client):
     import numpy as np
-    for _ in range(1000):
-        k3d = np.random.rand(25, 4)
-        data = [
-            {
-                'id': 0,
-                'keypoints3d': k3d
-            }
-        ]
-        client.send(data)
+    N_person = 10
+    datas = []
+    for i in range(N_person):
+        transl = (np.random.rand(1, 3) - 0.5) * 3
+        kpts = np.random.rand(25, 4)
+        kpts[:, :3] += transl
+        data = {
+            'id': i,
+            'keypoints3d': kpts
+        }
+        datas.append(data)
+    for _ in range(1):
+        for i in range(N_person):
+            move = (np.random.rand(1, 3) - 0.5) * 0.1
+            datas[i]['keypoints3d'][:, :3] += move
+        client.send(datas)
         time.sleep(0.005)
     client.close()
 
-def send_dir(client, path):
+def send_dir(client, path, step):
     from os.path import join
     from glob import glob
     from tqdm import tqdm
     from easymocap.mytools.reader import read_keypoints3d
     results = sorted(glob(join(path, '*.json')))
-    for result in tqdm(results):
-        data = read_keypoints3d(result)
-        client.send(data)
+    for result in tqdm(results[::step]):
+        if args.smpl:
+            data = read_smpl(result)
+            client.send_smpl(data)
+        else:
+            data = read_keypoints3d(result)
+            client.send(data)
         time.sleep(0.005)
 
 if __name__ == "__main__":
     import argparse
     parser = argparse.ArgumentParser()
-    parser.add_argument('--host', type=str, default='auto')
+    parser.add_argument('--host', type=str, default='127.0.0.1')
     parser.add_argument('--port', type=int, default=9999)
+    parser.add_argument('--step', type=int, default=1)
     parser.add_argument('--path', type=str, default=None)
+    parser.add_argument('--smpl', action='store_true')
     parser.add_argument('--debug', action='store_true')
     args = parser.parse_args()
 
@@ -49,6 +63,6 @@ if __name__ == "__main__":
     client = BaseSocketClient(args.host, args.port)
 
     if args.path is not None and os.path.isdir(args.path):
-        send_dir(client, args.path)
+        send_dir(client, args.path, step=args.step)
     else:
         send_rand(client)
\ No newline at end of file
diff --git a/config/vis3d/o3d_scene.yml b/config/vis3d/o3d_scene.yml
index 2839736..72c71fb 100644
--- a/config/vis3d/o3d_scene.yml
+++ b/config/vis3d/o3d_scene.yml
@@ -18,6 +18,13 @@ body_model:
     body_type: "body25"
     joint_radius: 0.02
 
+camera:
+  phi: 0
+  theta: -30
+  cx: 0.
+  cy: 0.
+  cz: 6.
+
 scene:
   "easymocap.visualize.o3dwrapper.create_coord":
     camera: [0, 0, 0]
diff --git a/config/vis3d/o3d_scene_manol.yml b/config/vis3d/o3d_scene_manol.yml
new file mode 100644
index 0000000..ec99f63
--- /dev/null
+++ b/config/vis3d/o3d_scene_manol.yml
@@ -0,0 +1,11 @@
+parent: "config/vis3d/o3d_scene.yml"
+
+body_model:
+  module: "easymocap.smplmodel.body_model.SMPLlayer"
+  args:
+    _no_merge_: True
+    model_path: "data/smplx/smplh/MANO_LEFT.pkl"
+    model_type: "mano"
+    gender: "neutral"
+    device: "cuda"
+    regressor_path: "data/smplx/J_regressor_mano_LEFT.txt"
\ No newline at end of file
diff --git a/config/vis3d/o3d_scene_smplx.yml b/config/vis3d/o3d_scene_smplx.yml
new file mode 100644
index 0000000..f41a8e7
--- /dev/null
+++ b/config/vis3d/o3d_scene_smplx.yml
@@ -0,0 +1,11 @@
+parent: "config/vis3d/o3d_scene.yml"
+
+body_model:
+  module: "easymocap.smplmodel.body_model.SMPLlayer"
+  args:
+    _no_merge_: True
+    model_path: "data/smplx/smplx"
+    model_type: "smplx"
+    gender: "neutral"
+    device: "cuda"
+    regressor_path: "data/smplx/J_regressor_body25_smplx.txt"
\ No newline at end of file
diff --git a/config/vis3d/o3d_scene_total.yml b/config/vis3d/o3d_scene_total.yml
new file mode 100644
index 0000000..eb3ba32
--- /dev/null
+++ b/config/vis3d/o3d_scene_total.yml
@@ -0,0 +1,6 @@
+parent: "config/vis3d/o3d_scene.yml"
+
+body_model:
+  args:
+    body_type: "bodyhandface"
+    joint_radius: 0.02
\ No newline at end of file
diff --git a/doc/assets/mvmp1f.gif b/doc/assets/mvmp1f.gif
new file mode 100644
index 0000000..dc2d243
Binary files /dev/null and b/doc/assets/mvmp1f.gif differ
diff --git a/doc/installation.md b/doc/installation.md
index 61316d1..8c773cf 100644
--- a/doc/installation.md
+++ b/doc/installation.md
@@ -2,7 +2,7 @@
  * @Date: 2021-04-02 11:52:33
  * @Author: Qing Shuai
  * @LastEditors: Qing Shuai
- * @LastEditTime: 2021-04-13 17:15:49
+ * @LastEditTime: 2021-06-21 21:18:45
  * @FilePath: /EasyMocapRelease/doc/installation.md
 -->
 # EasyMocap - Installation
@@ -27,6 +27,8 @@ data
     ├── J_regressor_body25.npy
     ├── J_regressor_body25_smplh.txt
     ├── J_regressor_body25_smplx.txt
+    ├── J_regressor_mano_LEFT.txt
+    ├── J_regressor_mano_RIGHT.txt
     ├── smpl
     │   ├── SMPL_FEMALE.pkl
     │   ├── SMPL_MALE.pkl
@@ -47,7 +49,7 @@ This part is used in `1v1p*.py`. You can skip this step if you only use the mult
 
 Download pretrained SPIN model [here](http://visiondata.cis.upenn.edu/spin/model_checkpoint.pt) and place it to `data/models/spin_checkpoints.pt`.
 
-Fetch the extra data [here](http://visiondata.cis.upenn.edu/spin/dataset_extras.tar.gz) and place the `smpl_mean_params.npz` to `data/models/smpl_mean_params.npz`.
+Fetch the extra data [here](http://visiondata.cis.upenn.edu/spin/data.tar.gz) and place the `smpl_mean_params.npz` to `data/models/smpl_mean_params.npz`.
 
 ## 0.3 (Optional) 2D model
 
diff --git a/doc/realtime_visualization.md b/doc/realtime_visualization.md
index 900f05c..817caf4 100644
--- a/doc/realtime_visualization.md
+++ b/doc/realtime_visualization.md
@@ -2,7 +2,7 @@
  * @Date: 2021-06-04 15:56:55
  * @Author: Qing Shuai
  * @LastEditors: Qing Shuai
- * @LastEditTime: 2021-06-12 15:29:23
+ * @LastEditTime: 2021-06-28 12:11:58
  * @FilePath: /EasyMocapRelease/doc/realtime_visualization.md
 -->
 # EasyMoCap -> Real-time Visualization
@@ -74,4 +74,84 @@ data = [
 
 ## Define your scene
 
-In the configuration file, we main define the `body_model` and `scene`. You can replace them for your data.
\ No newline at end of file
+In the configuration file, we main define the `body_model` and `scene`. You can replace them for your data.
+
+## Examples
+
+To understand our code, we provide lots of results for visualization.
+
+### 1. Skeletons
+
+Basic skeletons:
+
+```bash
+# Start the server:
+python3 apps/vis/vis_server.py --cfg config/vis3d/o3d_scene.yml write True out ${vis}/output/skel/base camera.cz 3. camera.cy 0.5
+# Send the keypoints:
+python3 apps/vis/vis_client.py --path ${vis}/smpl/keypoints3d
+```
+
+Body+Face+Hand:
+```bash
+# Start the server:
+python3 apps/vis/vis_server.py --cfg config/vis3d/o3d_scene_total.yml write True out ${vis}/output/skel/total camera.cz 3. camera.cy 0.5
+# Send the keypoints:
+python3 apps/vis/vis_client.py --path ${vis}/smplx/keypoints3d
+```
+
+Multiple Person:
+
+```bash
+# Start the server:
+python3 apps/vis/vis_server.py --cfg config/vis3d/o3d_scene.yml write True out ${vis}/output/skel/base camera.cz 3. camera.cy 0.5
+# Send the keypoints:
+python3 apps/vis/vis_client.py --path ${vis}/multi/keypoints3d --step 4
+```
+
+### 2. Mesh
+
+SMPL:
+```bash
+# Start the server:
+python3 apps/vis/vis_server.py --cfg config/vis3d/o3d_scene_smpl.yml write True out ${vis}/output/smpl/base camera.cz 3. camera.cy 0.5
+# Send the keypoints:
+python3 apps/vis/vis_client.py --path ${vis}/smpl/smpl --smpl
+```
+
+SMPLX:
+```bash
+# Start the server:
+python3 apps/vis/vis_server.py --cfg config/vis3d/o3d_scene_smplx.yml write True out ${vis}/output/smpl/smplx camera.cz 3. camera.cy 0.5
+# Send the keypoints:
+python3 apps/vis/vis_client.py --path ${vis}/smplx/smpl --smpl
+```
+
+MANO:
+```bash
+# Start the server:
+python3 apps/vis/vis_server.py --cfg config/vis3d/o3d_scene_manol.yml write True out ${vis}/output/smpl/manol camera.cz 3. camera.cy 0.5
+# Send the keypoints:
+python3 apps/vis/vis_client.py --path ${vis}/manol/smpl --smpl
+```
+
+## Advanced
+
+### 1. Camera Setting
+
+Try to modify these keys to control the location and rotation of the cameras.
+```yml
+camera:
+  phi: 0
+  theta: -30
+  cx: 0.
+  cy: 0.
+  cz: 6.
+```
+
+### 2. Scene Setting
+
+We provide some useful mesh in `easymocap.visualize.o3dwrapper`. If you want to add your own 3D mesh, add it to the key `scene`.
+
+### 3. Body Model
+
+At present, we just allow use one type of body model in the scene for fast visualization. So you must set the body model before you run the `apps/vis/vis_server.py`. If you want to use different models in a scene, you can implement it and pull a request.
\ No newline at end of file
diff --git a/easymocap/assignment/track.py b/easymocap/assignment/track.py
index 3c18e95..14b605b 100644
--- a/easymocap/assignment/track.py
+++ b/easymocap/assignment/track.py
@@ -2,7 +2,7 @@
   @ Date: 2021-06-27 16:21:50
   @ Author: Qing Shuai
   @ LastEditors: Qing Shuai
-  @ LastEditTime: 2021-06-28 10:32:40
+  @ LastEditTime: 2021-06-28 10:59:59
   @ FilePath: /EasyMocapRelease/easymocap/assignment/track.py
 '''
 from tqdm import tqdm
@@ -146,6 +146,8 @@ class BaseTrack:
         for pid in range(occupancy.shape[0]):
             if occupancy[pid].sum() > self.MIN_FRAMES:
                 pids.append(pid)
+            else:
+                print('[track] remove {} with {} frames'.format(pid, occupancy[pid].sum()))
         occupancy = occupancy[pids]
         for nf in range(nFrames):
             result = results[nf]
@@ -171,6 +173,7 @@ class BaseTrack:
                     right = right.min() + nf + 1
                 else:
                     continue
+                print('[interp] {} in [{}, {}]'.format(pid, left, right))
                 # find valid (left, right)
                 # interpolate 3d pose
                 info_left = [res for res in results[left] if res['id'] == pid][0]
@@ -180,7 +183,7 @@ class BaseTrack:
                     res = self._interpolate(info_left, info_right, weight)
                     res['id'] = pid
                     results[nf_i].append(res)
-                    occupancy[pid, nf_i] = pid
+                    occupancy[pid, nf_i] = 1
         return results, occupancy
     
     def smooth(self, results, occupancy):
@@ -227,9 +230,9 @@ class Track3D(BaseTrack):
                         import ipdb; ipdb.set_trace()
         return results
     
-    def write(self, results, mapid):
+    def write(self, results, occupancy):
         os.makedirs(self.out, exist_ok=True)
-        for nf, res in enumerate(results):
+        for nf, res in enumerate(tqdm(results)):
             outname = join(self.out, 'keypoints3d', '{:06d}.json'.format(nf))
             result = results[nf]
             write_keypoints3d(outname, result)
diff --git a/easymocap/mytools/reader.py b/easymocap/mytools/reader.py
index 158a274..6333c26 100644
--- a/easymocap/mytools/reader.py
+++ b/easymocap/mytools/reader.py
@@ -2,8 +2,8 @@
   @ Date: 2021-04-21 15:19:21
   @ Author: Qing Shuai
   @ LastEditors: Qing Shuai
-  @ LastEditTime: 2021-06-26 17:37:07
-  @ FilePath: /EasyMocap/easymocap/mytools/reader.py
+  @ LastEditTime: 2021-06-28 11:55:27
+  @ FilePath: /EasyMocapRelease/easymocap/mytools/reader.py
 '''
 # function to read data
 """
@@ -44,8 +44,9 @@ def read_smpl(filename):
     datas = read_json(filename)
     outputs = []
     for data in datas:
-        for key in ['Rh', 'Th', 'poses', 'shapes']:
-            data[key] = np.array(data[key])
+        for key in ['Rh', 'Th', 'poses', 'shapes', 'expression']:
+            if key in data.keys():
+                data[key] = np.array(data[key])
         # for smplx results
         outputs.append(data)
     return outputs
diff --git a/easymocap/socket/utils.py b/easymocap/socket/utils.py
index cde700c..1c1d0bc 100644
--- a/easymocap/socket/utils.py
+++ b/easymocap/socket/utils.py
@@ -2,8 +2,8 @@
   @ Date: 2021-05-24 20:07:34
   @ Author: Qing Shuai
   @ LastEditors: Qing Shuai
-  @ LastEditTime: 2021-06-16 14:42:23
-  @ FilePath: /EasyMocap/easymocap/socket/utils.py
+  @ LastEditTime: 2021-06-28 12:05:35
+  @ FilePath: /EasyMocapRelease/easymocap/socket/utils.py
 '''
 import cv2
 import numpy as np
@@ -15,7 +15,7 @@ def encode_detect(data):
     return res.encode('ascii')
 
 def encode_smpl(data):
-    res = write_common_results(None, data, ['poses', 'shapes', 'Rh', 'Th'])
+    res = write_common_results(None, data, ['poses', 'shapes', 'expression', 'Rh', 'Th'])
     res = res.replace('\r', '').replace('\n', '').replace(' ', '')
     return res.encode('ascii')
 
diff --git a/easymocap/visualize/skelmodel.py b/easymocap/visualize/skelmodel.py
index e2683e6..fd39ce4 100644
--- a/easymocap/visualize/skelmodel.py
+++ b/easymocap/visualize/skelmodel.py
@@ -2,8 +2,8 @@
   @ Date: 2021-01-17 21:38:19
   @ Author: Qing Shuai
   @ LastEditors: Qing Shuai
-  @ LastEditTime: 2021-06-18 18:48:37
-  @ FilePath: /EasyMocap/easymocap/visualize/skelmodel.py
+  @ LastEditTime: 2021-06-28 11:43:00
+  @ FilePath: /EasyMocapRelease/easymocap/visualize/skelmodel.py
 '''
 import numpy as np
 import cv2
@@ -47,6 +47,7 @@ class SkelModel:
             config = CONFIG[body_type]
             self.nJoints = config['nJoints']
             self.kintree = config['kintree']
+        self.body_type = body_type
         self.device = 'none'
         cur_dir = os.path.dirname(__file__)
         faces = np.loadtxt(join(cur_dir, 'sphere_faces_20.txt'), dtype=np.int)
@@ -76,22 +77,30 @@ class SkelModel:
         for nper in range(keypoints3d.shape[0]):
             vertices_all = []
             kpts3d = keypoints3d[nper]
-            for nj in range(self.nJoints):
-                if kpts3d[nj, -1] < min_conf:
-                    vertices_all.append(self.vertices*0.001)
-                    continue
-                vertices_all.append(self.vertices*r + kpts3d[nj:nj+1, :3])
             # limb
+            closet_joints = []
             for nk, (i, j) in enumerate(self.kintree):
                 if kpts3d[i][-1] < min_conf or kpts3d[j][-1] < min_conf:
                     vertices_all.append(self.vertices*0.001)
                     continue
                 T, _, length = calTransformation(kpts3d[i, :3], kpts3d[j, :3], r=1)
-                if length > 2: # 超过两米的
+                if length > 2: # large than 2 meter
                     vertices_all.append(self.vertices*0.001)
                     continue
+                if length < self.joint_radius * 5:
+                    closet_joints.append(i)
+                    closet_joints.append(j)
                 vertices = self.vertices @ T[:3, :3].T + T[:3, 3:].T
                 vertices_all.append(vertices)
+            for nj in range(self.nJoints):
+                if self.body_type in ['bodyhand', 'bodyhandface'] and nj > 25:
+                    r_ = r / 2
+                else:
+                    r_ = r
+                if kpts3d[nj, -1] < min_conf:
+                    vertices_all.append(self.vertices*0.001)
+                    continue
+                vertices_all.append(self.vertices*r_ + kpts3d[nj:nj+1, :3])
             vertices = np.vstack(vertices_all)
             verts_final.append(vertices)
         verts_final = np.stack(verts_final)