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 ## Payment / Billing Integration
 
  * [Ping++](https://pingxx.com/) - 轻便高效的聚合支付模块，支持微信、支付宝、银联等主流支付渠道。每月前十万笔成功交易免费，超出部分 0.01元/笔。
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+[![Bitdeli Badge](https://d2weczhvl823v0.cloudfront.net/qinghuaiorg/free-for-dev-zh/trend.png)](https://bitdeli.com/free "Bitdeli Badge")
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