沙箱环境支付，查询，退款都返回正常的数据，只是调用退款查询时返回ORDERNOTEXIST，请问是什么原因。
支付请求接口地址：https://api.mch.weixin.qq.com/sandboxnew/pay/micropay
请求数据参数：<xml><appid><![CDATA[wx75e97af611a2b16e]]></appid><attach>1086</attach><auth_code>134732310739309040</auth_code><body><![CDATA[沈阳分公司******]]></body><detail><![CDATA[{"cost_price":502,"goods_detail":{"goods_id":"1086","goods_name":"沈阳分公司******","quantity":1,"price":502}}]]></detail><device_info>1086</device_info><goods_tag><![CDATA[test]]></goods_tag><mch_id>1438317602</mch_id><nonce_str><![CDATA[cwxdsamgp2tnb84m5x5luyuu11yazncf]]></nonce_str><out_trade_no><![CDATA[8bb12bf2ce182302bdd2ddaafa7cfa7c]]></out_trade_no><spbill_create_ip><![CDATA[127.0.0.1]]></spbill_create_ip><sub_mch_id>1546002931</sub_mch_id><time_expire>20190904102417</time_expire><time_start>20190904101417</time_start><total_fee>502</total_fee><sign><![CDATA[AE7FE5598D73006A24C51C64CF03F2FE]]></sign></xml>
返回数据：
[appid] => wx75e97af611a2b16e
[attach] => 1086
[bank_type] => CMC
[cash_fee] => 501
[cash_fee_type] => CNY
[coupon_batch_id_0] => 12345
[coupon_count] => 1
[coupon_fee] => 1
[coupon_fee_0] => 1
[coupon_id_0] => 10000
[coupon_type_0] => CASH
[device_info] => 1086
[err_code] => SUCCESS
[err_code_des] => ok
[fee_type] => CNY
[is_subscribe] => Y
[mch_id] => 1438317602
[nonce_str] => cwxdsamgp2tnb84m5x5luyuu11yazncf
[openid] => 085e9858e9914da9a0da5522a
[out_trade_no] => 8bb12bf2ce182302bdd2ddaafa7cfa7c
[result_code] => SUCCESS
[return_code] => SUCCESS
[return_msg] => OK
[settlement_total_fee] => 501
[sign] => 6FDEB205C4E4A40C672804483B6DFB9A
[time_end] => 20190904101419
[total_fee] => 502
[trade_type] => MICROPAY
[transaction_id] => 4243717388620190904101419496874
订单查询请求接口地址：https://api.mch.weixin.qq.com/sandboxnew/pay/orderquery
请求参数：<xml><appid><![CDATA[wx75e97af611a2b16e]]></appid><mch_id>1438317602</mch_id><nonce_str><![CDATA[n6z54eqv2vhc7ra08mnacae1h6m1gpms]]></nonce_str><out_trade_no><![CDATA[8bb12bf2ce182302bdd2ddaafa7cfa7c]]></out_trade_no><sub_mch_id>1546002931</sub_mch_id><sign><![CDATA[1835D78D6B373D9CE8D993B4EE75E62B]]></sign></xml>
返回数据：
[appid] => wx75e97af611a2b16e
[attach] => sandbox_attach
[bank_type] => CMC
[cash_fee] => 501
[cash_fee_type] => CNY
[coupon_batch_id_0] => 12345
[coupon_count] => 1
[coupon_fee] => 1
[coupon_fee_0] => 1
[coupon_id_0] => 10000
[coupon_type_0] => NO_CASH
[device_info] => sandbox
[err_code] => SUCCESS
[err_code_des] => SUCCESS
[fee_type] => CNY
[is_subscribe] => Y
[mch_id] => 1438317602
[nonce_str] => n6z54eqv2vhc7ra08mnacae1h6m1gpms
[openid] => wxd930ea5d5a258f4f
[out_trade_no] => 8bb12bf2ce182302bdd2ddaafa7cfa7c
[result_code] => SUCCESS
[return_code] => SUCCESS
[return_msg] => OK
[settlement_total_fee] => 501
[sign] => A03387A267E7B8C5DF326634C73F1D41
[sub_mch_id] => 1546002931
[time_end] => 20190904101726
[total_fee] => 502
[trade_state] => SUCCESS
[trade_state_desc] => ok
[trade_type] => APP
[transaction_id] => 4460894749920190904101726391500
退款接口地址：https://api.mch.weixin.qq.com/sandboxnew/pay/refund
请求数据：<xml><appid><![CDATA[wx75e97af611a2b16e]]></appid><mch_id>1438317602</mch_id><nonce_str><![CDATA[qrv4gfgtvk2pbtc7tq7wi7l15dh3inov]]></nonce_str><op_user_id>1438317602</op_user_id><out_refund_no>1567563875</out_refund_no><out_trade_no><![CDATA[8bb12bf2ce182302bdd2ddaafa7cfa7c]]></out_trade_no><refund_fee>502</refund_fee><sub_mch_id>1546002931</sub_mch_id><total_fee>502</total_fee><sign><![CDATA[357CCCFB4A6CC88C2FC98764CFE499DF]]></sign></xml>
返回数据：
[appid] => wx75e97af611a2b16e
[bank_type] => CMC
[cash_fee] => 501
[cash_fee_type] => CNY
[cash_refund_fee] => 501
[cash_refund_fee_type] => CNY
[coupon_refund_count] => 1
[coupon_refund_fee] => 1
[coupon_refund_fee_0] => 1
[coupon_refund_id_0] => 12345
[coupon_type_0] => NO_CASH
[device_info] => sandbox
[err_code] => SUCCESS
[err_msg] => SUCCESS
[fee_type] => CNY
[mch_id] => 1438317602
[nonce_str] => qrv4gfgtvk2pbtc7tq7wi7l15dh3inov
[openid] => wxd930ea5d5a258f4f
[out_refund_no] => 1567563875
[out_trade_no] => 8bb12bf2ce182302bdd2ddaafa7cfa7c
[refund_fee] => 502
[refund_fee_type] => CNY
[refund_id] => 4266893025120190904102437784
[result_code] => SUCCESS
[return_code] => SUCCESS
[return_msg] => OK
[settlement_refund_fee] => 501
[settlement_total_fee] => 501
[sign] => B2D7B0BE6A4B399BE953462D764EB9EB
[total_fee] => 502
[trade_type] => MICROPAY
[transaction_id] => 4266893025120190904102437784527
退款查询地址：https://api.mch.weixin.qq.com/sandboxnew/pay/refundquery
请求数据：<xml><appid><![CDATA[wx75e97af611a2b16e]]></appid><mch_id>1438317602</mch_id><nonce_str><![CDATA[zfzzk470y0cxofxn8qivvn6lqc57jgk1]]></nonce_str><out_trade_no><![CDATA[8bb12bf2ce182302bdd2ddaafa7cfa7c]]></out_trade_no><sign><![CDATA[AE7DBBD1E4E2A2A3231C7C8BBB645C7E]]></sign></xml>
返回数据：
[appid] => wx75e97af611a2b16e
[device_info] => sandbox
[err_code] => ORDERNOTEXIST
[err_code_des] => ORDERNOTEXIST
[mch_id] => 1438317602
[nonce_str] => zfzzk470y0cxofxn8qivvn6lqc57jgk1
[result_code] => FAIL
[return_code] => SUCCESS
[return_msg] => OK
[sign] => 4F40FEED470E2DA2DB8074CBDED302EE
每次退款查询都是返回订单不存在ORDERNOTEXIST，请问是什么原因造成了。需要如何修改？
谢谢！
确认支付成功的情况下，需要确认单号是否正确