update en docs

README_ch.md

@@ -22,7 +22,7 @@
 
 ## 近期更新
 
-- 🔥️ 发布[PP-ShiTuV2](./docs/zh_CN/PPShiTu/PPShiTuV2_introduction.md)，recall1精度提升8个点，覆盖20+识别场景，新增[库管理工具](./deploy/shitu_index_manager/)，[Android Demo](./docs/zh_CN/quick_start/quick_start_recognition.md)全新体验。
+- 🔥️ 发布[PP-ShiTuV2](./docs/zh_CN/PPShiTu/PPShiTuV2_introduction.md)，recall1精度提升8个点，覆盖[20+识别场景](./docs/zh_CN/introduction/ppshitu_application_scenarios.md)，新增[库管理工具](./deploy/shitu_index_manager/)，[Android Demo](./docs/zh_CN/quick_start/quick_start_recognition.md)全新体验。
 - 2022.9.4 新增[生鲜产品自主结算范例库](https://aistudio.baidu.com/aistudio/projectdetail/4486158)，具体内容可以在AI Studio上体验。
 - 2022.6.15 发布[PULC超轻量图像分类实用方案](docs/zh_CN/PULC/PULC_train.md)，CPU推理3ms，精度比肩SwinTransformer，覆盖人、车、OCR场景九大常见任务。
 - 2022.5.23 新增[人员出入管理范例库](https://aistudio.baidu.com/aistudio/projectdetail/4094475)，具体内容可以在 AI Studio 上体验。
@@ -100,6 +100,7 @@ PP-ShiTu图像识别快速体验：[点击这里](./docs/zh_CN/quick_start/quick
 - 前沿算法
   - [骨干网络和预训练模型库](docs/zh_CN/algorithm_introduction/ImageNet_models.md)
   - [度量学习](docs/zh_CN/algorithm_introduction/metric_learning.md)
+    - [ReID](./docs/zh_CN/algorithm_introduction/reid.md)
   - [模型压缩](docs/zh_CN/algorithm_introduction/model_prune_quantization.md)
   - [模型蒸馏](docs/zh_CN/algorithm_introduction/knowledge_distillation.md)
   - [数据增强](docs/zh_CN/advanced_tutorials/DataAugmentation.md)

README_en.md

@@ -54,6 +54,11 @@ Based on th algorithms above, PaddleClas release PP-ShiTu image recognition syst
 ## Quick Start
 Quick experience of PP-ShiTu image recognition system：[Link](./docs/en/quick_start/quick_start_recognition_en.md)
 
+<div align="center">
+<img src="./docs/images/quick_start/android_demo/PPShiTu_qrcode.png"  width = "40%" />
+<p>PP-ShiTuV2 Android Demo</p>
+</div>
+
 Quick experience of **P**ractical **U**ltra **L**ight-weight image **C**lassification models：[Link](docs/en/PULC/PULC_quickstart_en.md)
 
 ## Tutorials
@@ -61,6 +66,8 @@ Quick experience of **P**ractical **U**ltra **L**ight-weight image **C**lassific
 - [Install Paddle](./docs/en/installation/install_paddle_en.md)
 - [Install PaddleClas Environment](./docs/en/installation/install_paddleclas_en.md)
 - [PP-ShiTuV2 Image Recognition Systems Introduction](./docs/en/PPShiTu/PPShiTuV2_introduction.md)
+  - [Image Recognition Quick Start](docs/en/quick_start/quick_start_recognition_en.md)
+  - [20+ application scenarios](docs/zh_CN/introduction/ppshitu_application_scenarios.md)
   - Submodule Introduction and Model Training
     - [Mainbody Detection](./docs/zh_CN/image_recognition_pipeline/mainbody_detection.md)
     - [Feature Extraction](./docs/en/image_recognition_pipeline/feature_extraction_en.md)