## 线上系统退款时偶尔出现此问题，三五天就会遇到一次，困扰多时，烦请帮忙看看，多谢~ ###
## 退款接口 https://api.mch.weixin.qq.com/secapi/pay/refund
## 第一次提交 ###################################
<xml>
    <appid><![CDATA[wx0e80cd07ec51696d]]></appid>
    <mch_id>1544103871</mch_id>
    <nonce_str><![CDATA[jy1ui4uwo7fty3j26ngaqsfyf95wej5s]]></nonce_str>
    <op_user_id>1544103871</op_user_id>
    <out_refund_no><![CDATA[00520042618311173492d2d24b64518c97240da58727c7805179c7ccf5ab036f]]></out_refund_no>
    <refund_fee>48000</refund_fee>
    <total_fee>48000</total_fee>
    <transaction_id>4200000567202004266011152323</transaction_id>
    <sign><![CDATA[0A1F3FC4D9DC6CDCF63C3486DC0A549A]]></sign>
</xml>
## 反馈 System Error ###################################
<xml>
    <return_code><![CDATA[SUCCESS]]></return_code>
    <return_msg><![CDATA[OK]]></return_msg>
    <appid><![CDATA[wx0e80cd07ec51696d]]></appid>
    <mch_id><![CDATA[1544103871]]></mch_id>
    <nonce_str><![CDATA[2yIv2hV7Sg13d92m]]></nonce_str>
    <sign><![CDATA[D11512BBC20A39E4361835CBFE264FCB]]></sign>
    <result_code><![CDATA[FAIL]]></result_code>
    <err_code><![CDATA[SYSTEMERROR]]></err_code>
    <err_code_des><![CDATA[System Error]]></err_code_des>
</xml>
## 第二次提交 ###################################
<xml>
    <appid><![CDATA[wx0e80cd07ec51696d]]></appid>
    <mch_id>1544103871</mch_id>
    <nonce_str><![CDATA[rx56a1m7l37mr9de651yu36yvgfatws7]]></nonce_str>
    <op_user_id>1544103871</op_user_id>
    <out_refund_no><![CDATA[0052004261831117349227567fdaea1575f0d0532d8307a1df4d191a6a80f8a0]]></out_refund_no>
    <refund_fee>48000</refund_fee>
    <total_fee>48000</total_fee>
    <transaction_id>4200000567202004266011152323</transaction_id>
    <sign><![CDATA[F747A1A0EA9CB76A86EA0F735D1D02C7]]></sign>
</xml>
## 反馈 SUCCESS ###################################
<xml>
    <return_code><![CDATA[SUCCESS]]></return_code>
    <return_msg><![CDATA[OK]]></return_msg>
    <appid><![CDATA[wx0e80cd07ec51696d]]></appid>
    <mch_id><![CDATA[1544103871]]></mch_id>
    <nonce_str><![CDATA[8DV7jPI8oIzWyqDJ]]></nonce_str>
    <sign><![CDATA[82F0B982FF74D5DC24115D3659E14909]]></sign>
    <result_code><![CDATA[SUCCESS]]></result_code>
    <transaction_id><![CDATA[4200000567202004266011152323]]></transaction_id>
    <out_trade_no><![CDATA[00520042618311173492000000000000]]></out_trade_no>
    <out_refund_no><![CDATA[0052004261831117349227567fdaea1575f0d0532d8307a1df4d191a6a80f8a0]]></out_refund_no>
    <refund_id><![CDATA[50300303842020042600257300709]]></refund_id>
    <refund_channel><![CDATA[]]></refund_channel>
    <refund_fee>48000</refund_fee>
    <coupon_refund_fee>0</coupon_refund_fee>
    <total_fee>48000</total_fee>
    <cash_fee>48000</cash_fee>
    <coupon_refund_count>0</coupon_refund_count>
    <cash_refund_fee>48000</cash_refund_fee>
</xml>