add link to solve https://github.com/PaddlePaddle/VisualDL/issues/906 (#907)

* link to online demo (en)

* link to online demo (zh)

* change online demo link (en)

README.md

@@ -24,7 +24,7 @@
 
 VisualDL, a visualization analysis tool of PaddlePaddle, provides a variety of charts to show the trends of parameters, and visualizes model structures, data samples, histograms of tensors, PR curves , ROC curves and high-dimensional data distributions. It enables users to understand the training process and the model structure more clearly and intuitively so as to optimize models efficiently.
 
-VisualDL provides various visualization functions, including tracking metrics in real-time, visualizing the model structure, displaying the data sample, presenting the changes of distributions of tensors, showing the pr curves, projecting high-dimensional data to a lower dimensional space and more. Additionally, VisualDL provides VDL.service, which enables developers easily to save, track and share visualization results of experiments. For specific guidelines of each function, please refer to  [**VisualDL User Guide**](./docs/components/UserGuide-en.md). Currently, VisualDL iterates rapidly and new functions will be continuously added.
+VisualDL provides various visualization functions, including tracking metrics in real-time, visualizing the model structure, displaying the data sample, presenting the changes of distributions of tensors, showing the pr curves, projecting high-dimensional data to a lower dimensional space and more. Additionally, VisualDL provides VDL.service, which enables developers easily to save, track and share visualization results of experiments. For specific guidelines of each function, please refer to  [**VisualDL User Guide**](./docs/components/UserGuide-en.md). For up-to-date experience, please feel free to try our [**Online Demo**](https://www.paddlepaddle.org.cn/paddle/visualdl/demo). Currently, VisualDL iterates rapidly and new functions will be continuously added.
 
 Browsers supported by VisualDL are:
 

README_CN.md

@@ -24,7 +24,7 @@
 
 VisualDL是飞桨可视化分析工具，以丰富的图表呈现训练参数变化趋势、模型结构、数据样本、高维数据分布等。可帮助用户更清晰直观地理解深度学习模型训练过程及模型结构，进而实现高效的模型优化。
 
-VisualDL提供丰富的可视化功能，支持标量、图结构、数据样本可视化、直方图、PR曲线、ROC曲线及高维数据降维呈现等诸多功能，同时VisualDL提供可视化结果保存服务，通过VDL.service生成链接，保存并分享可视化结果。具体功能使用方式，请参见 [**VisualDL使用指南**](./docs/components/README.md)。项目正处于高速迭代中，敬请期待新组件的加入。
+VisualDL提供丰富的可视化功能，支持标量、图结构、数据样本可视化、直方图、PR曲线、ROC曲线及高维数据降维呈现等诸多功能，同时VisualDL提供可视化结果保存服务，通过VDL.service生成链接，保存并分享可视化结果。具体功能使用方式，请参见 [**VisualDL使用指南**](./docs/components/README.md)。如欲体验最新特性，欢迎试用我们的[**在线演示系统**](https://www.paddlepaddle.org.cn/paddle/visualdl/demo)。项目正处于高速迭代中，敬请期待新组件的加入。
 
 VisualDL支持浏览器：