update readme

README.md

-English | [简体中文](./README.md)
+English | [简体中文](./README_cn.md)
 
 # PaddleGAN
 
-still under development!!
+PaddleGAN is an development kit of Generative Adversarial Network based on PaddlePaddle.
 
-## Download Dataset
-This script could download several dataset for paired images for image2image translation task.
+![](./docs/imgs/color_sr_peking.gif)
 
-```
-cd PaddleGAN/script/
-bash pix2pix_download.sh [cityscapes|facades|edges2handbags|edges2shoes|maps]
-```
-## Train
-```
-python -u tools/main.py --config-file configs/cyclegan-cityscapes.yaml
-```
+Features:
 
-continue train from last checkpoint
-```
-python -u tools/main.py --config-file configs/cyclegan-cityscapes.yaml --resume your_checkpoint_path
-```
+- Highly Flexible:
+
+  Components are designed to be modular. Model architectures, as well as data
+preprocess pipelines, can be easily customized with simple configuration
+changes.
+
+- Rich applications:
+
+  PaddleGAN provides rich of applications, such as image generation, image restore, image colorization, video interpolate, makeup shifter.
+
+## Install
+
+### 1. install paddlepaddle
+
+PaddleGAN work with:
+* PaddlePaddle >= 2.0.0-rc
+* Python >= 3.5+
 
-multiple gpus train:
 ```
-CUDA_VISIBLE_DEVICES=0,1 python -m paddle.distributed.launch tools/main.py --config-file configs/pix2pix-cityscapes.yaml
+pip install -U paddlepaddle-gpu
 ```
 
-## Evaluate
+### 2. install ppgan
 ```
-python tools/main.py --config-file configs/cyclegan-cityscapes.yaml --evaluate-only --load your_weight_path
+git clone https://github.com/PaddlePaddle/PaddleGAN
+cd PaddleGAN
+
+pip install -v -e .  # or "python setup.py develop"
 ```
+
+## Data Prepare
+Please refer to [data prepare](./docs/data_prepare.md) for dataset preparation.
+
+## Get Start
+Please refer [get stated](./docs/get_started.md) for the basic usage of PaddleGAN.
+
+
+## License
+PaddleGAN is released under the [Apache 2.0 license](LICENSE).
+
+
+## Contributing
+
+Contributions are highly welcomed and we would really appreciate your feedback!!

README_cn.md

+[English](./README.md) | 简体中文
+
+# PaddleGAN
+
+PaddleGAN 是一个基于飞桨的生成对抗网络开发工具包.
+
+![](./docs/imgs/color_sr_peking.gif)
+
+特性:
+
+- 高度的灵活性:
+
+  模块化设计，解耦各个网络组件，开发者轻松搭建、试用各种检测模型及优化策略，快速得到高性能、定制化的算法。
+
+- 丰富的应用:
+
+  PaddleGAN 提供了非常多的应用，比如说图像生成，图像修复，图像上色，视频补帧，人脸妆容迁移等.
+
+## 安装
+
+### 1. 安装 paddlepaddle
+
+PaddleGAN 所需的版本:
+* PaddlePaddle >= 2.0.0-rc
+* Python >= 3.5+
+
+```
+pip install -U paddlepaddle-gpu
+```
+
+### 2. 安装ppgan
+```
+git clone https://github.com/PaddlePaddle/PaddleGAN
+cd PaddleGAN
+
+pip install -v -e .  # or "python setup.py develop"
+```
+
+## 数据准备
+请参考 [数据准备](./docs/data_prepare.md) 来准备对应的数据.
+
+
+## 快速开始
+训练，预测，推理等请参考 [快速开始](./docs/get_started.md).
+
+
+## 许可证书
+本项目的发布受[Apache 2.0 license](LICENSE)许可认证。
+
+
+## 贡献代码
+
+我们非常欢迎你可以为PaddleGAN提供代码，也十分感谢你的反馈。

docs/data_prepare.md

+## data prepare
+
+It is recommended to symlink the dataset root to `$PaddleGAN/data`.
+
+
+```
+PaddleGAN
+|-- configs
+|-- data
+|   |-- cityscapes
+|   |   ├── test
+|   |   ├── testA
+|   |   ├── testB
+|   |   ├── train
+|   |   ├── trainA
+|   |   └── trainB
+|   ├── horse2zebra
+|   |   ├── testA
+|   |   ├── testB
+|   |   ├── trainA
+|   |   └── trainB
+|   └── facades
+|       ├── test
+|       ├── train
+|       └── val
+|-- docs
+|-- ppgan
+|-- tools
+
+```
+
+### cyclegan datasets
+more dataset for cyclegan you can download from [here](https://people.eecs.berkeley.edu/~taesung_park/CycleGAN/datasets/)
+
+### pix2pix datasets
+more dataset for pix2pix you can download from [here](hhttps://people.eecs.berkeley.edu/~tinghuiz/projects/pix2pix/datasets/)

docs/get_started.md

+## Train
+```
+python -u tools/main.py --config-file configs/cyclegan_cityscapes.yaml
+```
+
+continue train from last checkpoint
+```
+python -u tools/main.py --config-file configs/cyclegan_cityscapes.yaml --resume your_checkpoint_path
+```
+
+multiple gpus train:
+```
+CUDA_VISIBLE_DEVICES=0,1 python -m paddle.distributed.launch tools/main.py --config-file configs/pix2pix_cityscapes.yaml
+```
+
+## Evaluate
+```
+python tools/main.py --config-file configs/cyclegan_cityscapes.yaml --evaluate-only --load your_weight_path
+```