接口文档：https://docs.qq.com/doc/DV3lxV3hSbXFudVBE

支付接口：3.3 挂号/诊间支付统一下单API接口 https://api.weixin.qq.com/payinsurance/unifiedorder?access_token=ACCESS_TOKEN

这里传递0的时候  报下面的错

{"return_code":"SUCCESS","result_code":"FAIL","err_code":"513","err_code_des":"in cash combine insurance pay mode, cash_fee must be more than 0[graphid:33613527]","nonce_str":"kG6O0s9vGCTwuFlsnTLuzoycbhuIceUS","sign":"3E1FA5D365C6C9E8C292821FFCB1417D"}

不传cash_fee，报下面的错

{"return_code":"FAIL","return_msg":"参数格式校验错误 cash_fee is needed.... rid: 65518fd4-13784e5c-35cf3c2f"}