在使用商户转帐到零钱时 发起商户转帐 低于2000 不使用 “收款用户姓名 user_name” 可以正常转帐成功，使用 敏感信息加密后出错 400，

用户姓名加密程序如下：

公钥用的是 证书文件中的 apiclient_cert.pem

byte[] publicKey = Encoding.UTF8.GetBytes(证书文件);

 public static string RSAEncrypt(string text, byte[] publicKey)
        {
            using (var x509 = new X509Certificate2(publicKey))
            {
                using (var rsa = (RSACryptoServiceProvider)x509.PublicKey.Key)
                {
                    var buff = rsa.Encrypt(Encoding.UTF8.GetBytes(text), true);
                     return Convert.ToBase64String(buff);
                }
            }
        }

API接口请求程序如下：

public static string send(string authorization, string str, string UserAgent)
        {
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://api.mch.weixin.qq.com/v3/transfer/batches");
                request.UserAgent = UserAgent;
                request.Method = "POST";
                request.Accept = "application/json";
                request.ContentType = "application/json";
                request.Headers.Add("Authorization", authorization);
                request.Headers.Add("Wechatpay-Serial", WxPayConfig.CERTIFICATE);
                Stream requestStream = request.GetRequestStream();
                StreamWriter streamWriter = new StreamWriter(requestStream);
                streamWriter.Write(str);
                streamWriter.Flush();
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream responseStream = response.GetResponseStream();
                StreamReader streamReader = new StreamReader(responseStream);
                str = streamReader.ReadToEnd();
                streamWriter.Close();
                streamReader.Close();
            }
            catch (Exception e)
            {
                Log.Info("出错信息：", e.ToString());
            }
            return str;
        }

具体不知道什么原因，把姓名加入后就不能成功转帐

POST 请求 JSON数据如下：

{
    "appid": "wx4c00359c0c0ca000",
    "out_batch_no": "DP202209170022066342",
    "batch_name": "测试转帐",
    "batch_remark": "测试商户转帐到零钱",
    "total_amount": 100,
    "total_num": 1,
    "transfer_detail_list": [
        {
            "out_detail_no": "UD202209170022066343",
            "transfer_amount": 100,
            "transfer_remark": "测试转帐",
            "openid": "oA_LG610T2AOBSJbOC414141xt_8F4",
            "user_name": "jAkxHab9eU2SvrD7udOX//s3l+uXzsfEAaMJwKXDhQyMVzLwth2uj/4mILmSTsonqusfvYEagwUU9zYXHZCTETnH0SudYyaVjKA6/hUCkkuS7uxGm3HpwOwpv6sdIXyLk6aBr4A6XZblSTzUhNZG1WweJHL4F7ztuBx43V2E+ksg3D+TFHSqSNN1CSkVJ23jFHxjvKw4NrIKKywkILbODtpIPa6uW6oenyJCIruHr+3sR5Wrb6nZFxBoplrkwe1mUliikPRu8XIq6Qj0/Y0Yggdam/oh1gyPs3jHItJ2hAXGInct/GTCZamyGbyka/7kCrTEYGI92ADMOwoNM/be3w=="
        }
    ]
}