[1.SDK与demo下载](1.SDK%E4%B8%8Edemo%E4%B8%8B%E8%BD%BD.md) [2.测试DEMO](2.%E6%B5%8B%E8%AF%95DEMO.md) [3.将支付接口更为真实公众号信息](3.%E5%B0%86%E6%94%AF%E4%BB%98%E6%8E%A5%E5%8F%A3%E6%9B%B4%E4%B8%BA%E7%9C%9F%E5%AE%9E%E5%85%AC%E4%BC%97%E5%8F%B7%E4%BF%A1%E6%81%AF.md)