update app-payment-paypal-open.md

docs/tutorial/app-payment-paypal-open.md

 ## 申请开通Paypal
 * [登录/注册](https://www.paypal.com/c2/signin)
 * 打开[paypal开发者中心](https://developer.paypal.com/developer/applications)
-如图，依次选择My Apps & Credentials -> Live(如果创建沙箱环境点击Sandbox) -> Create App
-![](https://native-res.dcloud.net.cn/images/uniapp/payment/paypal_develop_center.png)
+选择 **Apps & Credentials** 点击 **Create App**创建应用，创建后点击编辑按钮，如图：
+![](https://native-res.dcloud.net.cn/images/uniapp/payment/paypal_app_center.png)
+* 进入应用详情，勾选**Log in with PayPal**点击 **Advanced Settings** 添加return URL等信息并保存。如图：
+![](https://native-res.dcloud.net.cn/images/uniapp/payment/paypal_add_feature.png)
 
-* 输入App Name,点击Create App
-![](https://native-res.dcloud.net.cn/images/uniapp/payment/paypal_create_app.png)
+![](https://native-res.dcloud.net.cn/images/uniapp/payment/paypal_edit_logininfo.png)
 
-* 创建完成后，点击AppName
-![](https://native-res.dcloud.net.cn/images/uniapp/payment/paypal_setup_app_info.png)
-
-* 查看Client ID 以及 Secret
-![](https://native-res.dcloud.net.cn/images/uniapp/payment/paypal_get_clientid.png)
-
-* 添加return URL并保存(必须使用小写字母)
-![](https://native-res.dcloud.net.cn/images/uniapp/payment/paypal_add_returnurl.png)
-
-* 勾选Accept payments 并点击Advanced options选择详情配置(点击保存后生效)
-![](https://native-res.dcloud.net.cn/images/uniapp/payment/paypal_accept_payments.png)
-
-* 勾选Log in with PayPal 并点击Advanced options选择详情配置(点击保存后生效)
-![](https://native-res.dcloud.net.cn/images/uniapp/payment/paypal_log_in.png)