curl --location --request POST '/secapi/pay/refund' \
--header 'Content-Type: application/xml' \
--data-raw '<xml>
<appid>wx2421b1c4370ec43b</appid>
<mch_id>10000100</mch_id>
<nonce_str>6cefdb308e1e2e8aabd48cf79e546a02</nonce_str>
<out_refund_no>1415701182</out_refund_no>
<out_trade_no>1415757673</out_trade_no>
<refund_fee>1</refund_fee>
<total_fee>1</total_fee>
<transaction_id>4006252001201705123297353072</transaction_id>
<sign>FE56DD4AA85C0EECA82C35595A69E153</sign>
</xml>'
<xml>
<return_code>
<![CDATA[SUCCESS]]>
</return_code>
<return_msg>
<![CDATA[OK]]>
</return_msg>
<appid>
<![CDATA[wx2421b1c4370ec43b]]>
</appid>
<mch_id>
<![CDATA[10000100]]>
</mch_id>
<nonce_str>
<![CDATA[NfsMFbUFpdbEhPXP]]>
</nonce_str>
<sign>
<![CDATA[B7274EB9F8925EB93100DD2085FA56C0]]>
</sign>
<result_code>
<![CDATA[SUCCESS]]>
</result_code>
<transaction_id>
<![CDATA[1008450740201411110005820873]]>
</transaction_id>
<out_trade_no>
<![CDATA[1415757673]]>
</out_trade_no>
<out_refund_no>
<![CDATA[1415701182]]>
</out_refund_no>
<refund_id>
<![CDATA[2008450740201411110000174436]]>
</refund_id>
<refund_fee>1</refund_fee>
</xml>