update zh-cn doc

README_zh.md

@@ -1,16 +1,22 @@
 ![php-excel](resource/logo.png)
 
-[![Build Status](https://travis-ci.org/viest/php-ext-xlswriter.svg?branch=master)](https://travis-ci.org/viest/php-ext-xlswriter)
-[![Build status](https://ci.appveyor.com/api/projects/status/w4cfjo9e4gsrs6rn/branch/master?svg=true)](https://ci.appveyor.com/project/viest/php-ext-excel-export/branch/master)
-[![](https://img.shields.io/github/release/viest/php-ext-excel-export.svg)](https://github.com/viest/php-ext-xlswriter)
-[![](https://img.shields.io/badge/PHP-%3E%3D%207.0-brightgreen.svg)](https://github.com/viest/php-ext-xlswriter)
-[![](https://img.shields.io/github/contributors/viest/php-ext-excel-export.svg)](https://github.com/viest/php-ext-xlswriter)
-[![](https://img.shields.io/badge/platform-macos%20%7C%20linux%20%7C%20windows-brightgreen.svg)](https://github.com/viest/php-ext-xlswriter)
-[![](https://img.shields.io/badge/license-BSD-green.svg)](https://github.com/viest/php-ext-xlswriter)
-[![](https://img.shields.io/github/issues/viest/php-ext-excel-export.svg)](https://github.com/viest/php-ext-xlswriter)
-[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fviest%2Fphp-ext-xlswriter.svg?type=shield)](https://app.fossa.io/projects/git%2Bgithub.com%2Fviest%2Fphp-ext-xlswriter?ref=badge_shield)
-
-#### 为什么使用xlswriter
+<div align=center>
+<a href="https://travis-ci.org/viest/php-ext-xlswriter"><img src="https://travis-ci.org/viest/php-ext-xlswriter.svg?branch=master"/></a>
+<a href="https://ci.appveyor.com/project/viest/php-ext-excel-export/branch/master"><img src="https://ci.appveyor.com/api/projects/status/w4cfjo9e4gsrs6rn/branch/master?svg=true"/></a>
+<a href="https://github.com/viest/php-ext-xlswriter/releases"><img src="https://img.shields.io/github/release/viest/php-ext-excel-export.svg"/></a>
+</div>
+
+<div align=center>
+<a href="https://opencollective.com/php-ext-xlswriter"><img src="https://opencollective.com/php-ext-xlswriter/all/badge.svg?label=financial+contributors"/></a>
+<a href="https://github.com/viest/php-ext-xlswriter"><img src="https://img.shields.io/badge/PHP-%3E%3D%207.0-brightgreen.svg"/></a>
+<a href="https://github.com/viest/php-ext-xlswriter"><img src="https://img.shields.io/github/contributors/viest/php-ext-excel-export.svg"/></a>
+<a href="https://github.com/viest/php-ext-xlswriter"><img src="https://img.shields.io/badge/platform-macos%20%7C%20linux%20%7C%20windows-brightgreen.svg"/></a>
+<a href="https://github.com/viest/php-ext-xlswriter"><img src="https://img.shields.io/badge/license-BSD-green.svg"/></a>
+<a href="https://github.com/viest/php-ext-xlswriter"><img src="https://img.shields.io/github/issues/viest/php-ext-excel-export.svg"/></a>
+<a href="https://app.fossa.io/projects/git%2Bgithub.com%2Fviest%2Fphp-ext-xlswriter?ref=badge_shield"><img src="https://app.fossa.io/api/projects/git%2Bgithub.com%2Fviest%2Fphp-ext-xlswriter.svg?type=shield"/></a>
+</div>
+
+## 为什么使用xlswriter
 
 请参考下方对比图；由于内存原因，PHPExcel数据量`相对较大`的情况下无法正常工作，虽然可以通过`修改memory_limit`配置来解决内存问题，但完成工作的时间可能会更长;
 
@@ -60,26 +66,57 @@ xlswriter是一个 PHP C 扩展，可用于在 Excel 2007+ XLSX 文件中读取
 * 全量模式：耗时 `3S`，内存仅 `558MB`；
 * 游标模式：耗时 `2.8S`，内存仅 `<1MB`；
 
-#### 从这里开始
+## 从这里开始
 
 [文档|Documents](https://xlswriter-docs.viest.me/)
 
-#### PECL 仓库
+## PECL 仓库
 
 [![pecl](resource/pecl.png)](https://pecl.php.net/package/xlswriter)
 
-#### IDE Helper
+## IDE Helper
 
 ```bash
 composer require viest/php-ext-xlswriter-ide-helper:dev-master
 ```
 
-#### 交流群
+## 交流群
 
 <img width="160" src="resource/qq.jpg"/>
 
-#### License
+## 贡献者
 
-FreeBSD license
+### 代码贡献者
+
+这个项目的存在要感谢所有贡献者。 [[Contribute](CONTRIBUTING.md)].
+<a href="https://github.com/viest/php-ext-xlswriter/graphs/contributors"><img src="https://opencollective.com/php-ext-xlswriter/contributors.svg?width=890&button=false" /></a>
+
+### 财务捐赠者
+
+成为财务捐赠者，并帮助我们维持我们的社区。[[Contribute](https://opencollective.com/php-ext-xlswriter/contribute)]
+
+#### 个人
+
+<a href="https://opencollective.com/php-ext-xlswriter"><img src="https://opencollective.com/php-ext-xlswriter/individuals.svg?width=890"></a>
+
+#### 组织机构
+
+与您的组织一起支持该项目。您的徽标将显示在此处，并带有指向您网站的链接。[[Contribute](https://opencollective.com/php-ext-xlswriter/contribute)]
+
+<a href="https://opencollective.com/php-ext-xlswriter/organization/0/website"><img src="https://opencollective.com/php-ext-xlswriter/organization/0/avatar.svg"></a>
+<a href="https://opencollective.com/php-ext-xlswriter/organization/1/website"><img src="https://opencollective.com/php-ext-xlswriter/organization/1/avatar.svg"></a>
+<a href="https://opencollective.com/php-ext-xlswriter/organization/2/website"><img src="https://opencollective.com/php-ext-xlswriter/organization/2/avatar.svg"></a>
+<a href="https://opencollective.com/php-ext-xlswriter/organization/3/website"><img src="https://opencollective.com/php-ext-xlswriter/organization/3/avatar.svg"></a>
+<a href="https://opencollective.com/php-ext-xlswriter/organization/4/website"><img src="https://opencollective.com/php-ext-xlswriter/organization/4/avatar.svg"></a>
+<a href="https://opencollective.com/php-ext-xlswriter/organization/5/website"><img src="https://opencollective.com/php-ext-xlswriter/organization/5/avatar.svg"></a>
+<a href="https://opencollective.com/php-ext-xlswriter/organization/6/website"><img src="https://opencollective.com/php-ext-xlswriter/organization/6/avatar.svg"></a>
+<a href="https://opencollective.com/php-ext-xlswriter/organization/7/website"><img src="https://opencollective.com/php-ext-xlswriter/organization/7/avatar.svg"></a>
+<a href="https://opencollective.com/php-ext-xlswriter/organization/8/website"><img src="https://opencollective.com/php-ext-xlswriter/organization/8/avatar.svg"></a>
+<a href="https://opencollective.com/php-ext-xlswriter/organization/9/website"><img src="https://opencollective.com/php-ext-xlswriter/organization/9/avatar.svg"></a>
+
+
+## License
+
+BSD license
 
 [![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fviest%2Fphp-ext-xlswriter.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2Fviest%2Fphp-ext-xlswriter?ref=badge_large)