参数只传了必填参数，请问到底是什么原因？

下面是我的请求数据：

<xml>

  <mch_id>服务商的mchId</mch_id>

  <sub_mch_id>1230000109</sub_mch_id>

  <nonce_str>1573105157274</nonce_str>

  <sign>B944F3A06A7D6C538F65C5C6664902EA97CA648B0D71B91C058521009CE6AF9F</sign>

  <sign_type>HMAC-SHA256</sign_type>

  <version>1.0</version>

  <cert_sn>5E96755461C9B164FA149287C6A5237AB100DE55</cert_sn>

  <organization_type>4</organization_type>

  <business_license_copy>yweTaK5qPsWkAVFsen0LRsfsCyvlI4WlBp_gdZZYWCkowc7z7TDX5UUOVxbiOqwCtmDNdpzvaHC-IHesUvJSeWKtdH8FIw1SZhv9s4UI0Kw</business_license_copy>

  <business_license_number>123456789012345</business_license_number>

  <merchant_name>深圳腾讯科技</merchant_name>

  <company_address>深圳市腾讯大厦</company_address>

  <legal_person>mIeGDay2iur7YwQbAm//LQeIOZyZVVgiH9gFex03OsKW5/hyOA2h5QzW0OK0uObIIHLJRK/wlwxnQknIL2W+3Yel6zeYlt///0VM1nfgc+uzg1DsEt3tugIYzcbiGH29lcYsEzfOSdbsfwfqK/hipNuFk3r0lWBl6rY9XGIae13kctcaxyf3aBbh2iK/Oo16AY8E06loaRdWhYeJ9UP4it1IaxADNU1JQpdoim6n4Ij0Gr8bNt2/c15xSvdHNJtvgDJkYDPFJPRRsNXMziDI9GQaZczZRfZ49YANZLdo7+d1pkahzhxzFgzsSSb7RCd9ksiYO0dHR4VbEJOIDHeT4Q==</legal_person>

  <business_time>[&quot;1970-01-01&quot;,&quot;长期&quot;]</business_time>

  <business_licence_type>1762</business_licence_type>

  <organization_copy>yweTaK5qPsWkAVFsen0LRjuMTuik-IShqYTL13Fq8M0AESShPP_WRU-10z9ZDxrsaxOqG6fF5A6hA8GYdruXrowHX25sA2xZXuMs_PqadMQ</organization_copy>

  <organization_number>1234567-1</organization_number>

  <account_bank>1001</account_bank>

  <merchant_shortname>qq</merchant_shortname>

  <business>719</business>

  <business_scene>[&quot;1721&quot;]</business_scene>

  <contact_email>goQfWChKiBcQNamiDRYID4zRrjYn9tWpfX9iT2V5w7XklfofSkAnLXtYa6MURcFuebK5CVL1R2TwqiRYHJIqzMok4YJ9piHX+Iv6mhLYCU5XZ9jR9LD0g36/uSjjUb/fqlLj8WrCyMO4rRlCDXTNZpNI8U6ALCsMhPlKEoala6xkypvswzGaieVFS3gLL4WzDyFtnjHBpeGyFdLdnh4m8aAVWRJyEMo4QlLQprbBbRnZEP7028MsZ0w7SYEUGp4tccpS1sidX1RXzHpHf4S9mE2rC5dmXgnRkt8JAO9j4xBeM6jt75req83h2HykAisDffLS7S+6AuBAE0wi/quVIw==</contact_email>

</xml>