curl --location --request POST '/pay/refundquery' \
--header 'Content-Type: application/xml' \
--data-raw '<xml>
<appid>wx2421b1c4370ec43b</appid>
<mch_id>10000100</mch_id>
<nonce_str>0b9f35f484df17a732e537c37708d1d0</nonce_str>
<out_refund_no></out_refund_no>
<out_trade_no>1415757673</out_trade_no>
<refund_id></refund_id>
<transaction_id></transaction_id>
<sign>66FFB727015F450D167EF38CCC549521</sign>
</xml>'
<xml>
<appid>
<![CDATA[wx8888888888888888]]>
</appid>
<mch_id>
<![CDATA[1900000109]]>
</mch_id>
<nonce_str>
<![CDATA[5K8264ILTKCH16CQ2502SI8ZNMTM67VS]]>
</nonce_str>
<out_trade_no>
<![CDATA[1217752501201407033233368018]]>
</out_trade_no>
<refund_count>1</refund_count>
<refund_fee_0>1</refund_fee_0>
<refund_id_0>
<![CDATA[2008450740201411110000174436]]>
</refund_id_0>
<refund_status_0>
<![CDATA[PROCESSING]]>
</refund_status_0>
<result_code>
<![CDATA[SUCCESS]]>
</result_code>
<return_code>
<![CDATA[SUCCESS]]>
</return_code>
<return_msg>
<![CDATA[OK]]>
</return_msg>
<cash_refund_fee>
<![CDATA[90]]>
</cash_refund_fee>
<sign>
<![CDATA[1F2841558E233C33ABA71A961D27561C]]>
</sign>
<transaction_id>
<![CDATA[1008450740201411110005820873]]>
</transaction_id>
</xml>