diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/BaseWxPayResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/BaseWxPayResult.java
index 1f6eba15c..51865664f 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/BaseWxPayResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/BaseWxPayResult.java
@@ -1,27 +1,10 @@
 package com.github.binarywang.wxpay.bean.result;
 
-import java.io.ByteArrayInputStream;
-import java.io.Serializable;
-import java.math.BigDecimal;
-import java.nio.charset.StandardCharsets;
-import java.util.List;
-import java.util.Map;
-import javax.xml.parsers.DocumentBuilderFactory;
-import javax.xml.xpath.XPathConstants;
-import javax.xml.xpath.XPathExpressionException;
-import javax.xml.xpath.XPathFactory;
-
-import com.github.binarywang.wxpay.util.XmlConfig;
-import org.apache.commons.lang3.StringUtils;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.w3c.dom.Document;
-import org.w3c.dom.NodeList;
-
 import com.github.binarywang.wxpay.constant.WxPayConstants;
 import com.github.binarywang.wxpay.exception.WxPayException;
 import com.github.binarywang.wxpay.service.WxPayService;
 import com.github.binarywang.wxpay.util.SignUtils;
+import com.github.binarywang.wxpay.util.XmlConfig;
 import com.google.common.base.Joiner;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
@@ -30,8 +13,22 @@ import com.thoughtworks.xstream.annotations.XStreamAlias;
 import lombok.Data;
 import me.chanjar.weixin.common.util.json.WxGsonBuilder;
 import me.chanjar.weixin.common.util.xml.XStreamInitializer;
+import org.apache.commons.lang3.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
 
-import org.w3c.dom.*;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.xpath.XPathConstants;
+import javax.xml.xpath.XPathExpressionException;
+import javax.xml.xpath.XPathFactory;
+import java.io.ByteArrayInputStream;
+import java.math.BigDecimal;
+import java.nio.charset.StandardCharsets;
+import java.util.List;
+import java.util.Map;
 
 /**
  * <pre>
@@ -42,9 +39,7 @@ import org.w3c.dom.*;
  * @author <a href="https://github.com/binarywang">Binary Wang</a>
  */
 @Data
-public abstract class BaseWxPayResult implements Serializable {
-  private static final long serialVersionUID = -3559552761816864481L;
-
+public abstract class BaseWxPayResult {
   /**
    * 返回状态码.
    */
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayAuthcode2OpenidResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayAuthcode2OpenidResult.java
index 03e35b1c9..eea7d8af4 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayAuthcode2OpenidResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayAuthcode2OpenidResult.java
@@ -6,6 +6,8 @@ import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import org.w3c.dom.Document;
 
+import java.io.Serializable;
+
 /**
  * <pre>
  *  授权码查询openid接口请求结果类
@@ -18,7 +20,8 @@ import org.w3c.dom.Document;
 @EqualsAndHashCode(callSuper = true)
 @NoArgsConstructor
 @XStreamAlias("xml")
-public class WxPayAuthcode2OpenidResult extends BaseWxPayResult {
+public class WxPayAuthcode2OpenidResult extends BaseWxPayResult implements Serializable {
+  private static final long serialVersionUID = -2409408725777108398L;
   /**
    * <pre>
    *   用户标识.
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayBillInfo.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayBillInfo.java
index f77d49e78..49b5b7bf3 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayBillInfo.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayBillInfo.java
@@ -1,11 +1,11 @@
 package com.github.binarywang.wxpay.bean.result;
 
-import java.io.Serializable;
-
 import lombok.Data;
 import lombok.NoArgsConstructor;
 import me.chanjar.weixin.common.util.json.WxGsonBuilder;
 
+import java.io.Serializable;
+
 /**
  * 交易时间:2017-04-06 01:00:02 公众账号ID: 商户号: 子商户号:0 设备号:WEB 微信订单号: 商户订单号:2017040519091071873216 用户标识: 交易类型:NATIVE
  * 交易状态:REFUND 付款银行:CFT 货币种类:CNY 总金额:0.00 企业红包金额:0.00 微信退款单号: 商户退款单号:20170406010000933 退款金额:0.01 企业红包退款金额:0.00
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayCommonResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayCommonResult.java
index 614bdc2a3..35e29a9e0 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayCommonResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayCommonResult.java
@@ -3,6 +3,8 @@ package com.github.binarywang.wxpay.bean.result;
 import com.thoughtworks.xstream.annotations.XStreamAlias;
 import org.w3c.dom.Document;
 
+import java.io.Serializable;
+
 /**
  * <pre>
  * 微信支付结果仅包含有return 和result等相关信息的的属性类
@@ -12,7 +14,9 @@ import org.w3c.dom.Document;
  * @author <a href="https://github.com/binarywang">Binary Wang</a>
  */
 @XStreamAlias("xml")
-public class WxPayCommonResult extends BaseWxPayResult {
+public class WxPayCommonResult extends BaseWxPayResult implements Serializable {
+  private static final long serialVersionUID = -8051324891539367420L;
+
   @Override
   protected void loadXml(Document d) {
   }
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayFacepayResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayFacepayResult.java
index 1b100ac4f..5fd6cfe8e 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayFacepayResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayFacepayResult.java
@@ -19,7 +19,6 @@ import org.w3c.dom.Document;
 @NoArgsConstructor
 @XStreamAlias("xml")
 public class WxPayFacepayResult extends BaseWxPayResult {
-
   private static final long serialVersionUID = -4116580976046716911L;
 
   /**
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayFundFlowBaseResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayFundFlowBaseResult.java
index 75ee1509f..ab9077615 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayFundFlowBaseResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayFundFlowBaseResult.java
@@ -1,11 +1,11 @@
 package com.github.binarywang.wxpay.bean.result;
 
-import java.io.Serializable;
-
 import lombok.Data;
 import lombok.NoArgsConstructor;
 import me.chanjar.weixin.common.util.json.WxGsonBuilder;
 
+import java.io.Serializable;
+
 /**
  * 记账时间:2018-02-01 04:21:23 微信支付业务单号:50000305742018020103387128253 资金流水单号:1900009231201802015884652186 业务名称:退款
  * 业务类型:退款 收支类型:支出 收支金额（元）:0.02 账户结余（元）:0.17 资金变更提交申请人:system 备注:缺货 业务凭证号:REF4200000068201801293084726067
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayFundFlowResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayFundFlowResult.java
index 7b789ca0c..3f26e0654 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayFundFlowResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayFundFlowResult.java
@@ -1,12 +1,12 @@
 package com.github.binarywang.wxpay.bean.result;
 
-import java.io.Serializable;
-import java.util.List;
-
 import lombok.Data;
 import lombok.NoArgsConstructor;
 import me.chanjar.weixin.common.util.json.WxGsonBuilder;
 
+import java.io.Serializable;
+import java.util.List;
+
 /**
  * <pre>
  * 下载资金账单接口响应结果对象类
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayMicropayResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayMicropayResult.java
index 678916d88..1eb1a7a60 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayMicropayResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayMicropayResult.java
@@ -6,6 +6,8 @@ import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import org.w3c.dom.Document;
 
+import java.io.Serializable;
+
 /**
  * <pre>
  * 提交刷卡支付接口响应结果对象类
@@ -18,7 +20,7 @@ import org.w3c.dom.Document;
 @EqualsAndHashCode(callSuper = true)
 @NoArgsConstructor
 @XStreamAlias("xml")
-public class WxPayMicropayResult extends BaseWxPayResult {
+public class WxPayMicropayResult extends BaseWxPayResult implements Serializable {
   private static final long serialVersionUID = 529670965722059189L;
 
   /**
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayOrderCloseResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayOrderCloseResult.java
index a98fec86a..8be7e858d 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayOrderCloseResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayOrderCloseResult.java
@@ -6,6 +6,8 @@ import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import org.w3c.dom.Document;
 
+import java.io.Serializable;
+
 /**
  * <pre>
  * 关闭订单结果对象类
@@ -18,8 +20,8 @@ import org.w3c.dom.Document;
 @EqualsAndHashCode(callSuper = true)
 @NoArgsConstructor
 @XStreamAlias("xml")
-public class WxPayOrderCloseResult extends BaseWxPayResult {
-
+public class WxPayOrderCloseResult extends BaseWxPayResult implements Serializable {
+  private static final long serialVersionUID = 800873502890274834L;
   /**
    * 业务结果描述
    */
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayOrderQueryResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayOrderQueryResult.java
index d21e1375d..aa9985dfa 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayOrderQueryResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayOrderQueryResult.java
@@ -27,7 +27,7 @@ import java.util.List;
 @EqualsAndHashCode(callSuper = true)
 @NoArgsConstructor
 @XStreamAlias("xml")
-public class WxPayOrderQueryResult extends BaseWxPayResult {
+public class WxPayOrderQueryResult extends BaseWxPayResult implements Serializable {
   private static final long serialVersionUID = 8241891654782412789L;
 
   /**
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayOrderReverseResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayOrderReverseResult.java
index 0f9abd3a7..e725ac568 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayOrderReverseResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayOrderReverseResult.java
@@ -6,6 +6,8 @@ import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import org.w3c.dom.Document;
 
+import java.io.Serializable;
+
 /**
  * <pre>
  * 撤销订单响应结果类
@@ -18,8 +20,8 @@ import org.w3c.dom.Document;
 @EqualsAndHashCode(callSuper = true)
 @NoArgsConstructor
 @XStreamAlias("xml")
-public class WxPayOrderReverseResult extends BaseWxPayResult {
-
+public class WxPayOrderReverseResult extends BaseWxPayResult implements Serializable {
+  private static final long serialVersionUID = 3615350465758009338L;
   /**
    * <pre>
    * 是否重调
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayQueryExchangeRateResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayQueryExchangeRateResult.java
index 957547e1b..c6f940993 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayQueryExchangeRateResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayQueryExchangeRateResult.java
@@ -6,6 +6,8 @@ import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import org.w3c.dom.Document;
 
+import java.io.Serializable;
+
 /**
  * 汇率查询响应.
  *
@@ -16,7 +18,7 @@ import org.w3c.dom.Document;
 @EqualsAndHashCode(callSuper = true)
 @NoArgsConstructor
 @XStreamAlias("xml")
-public class WxPayQueryExchangeRateResult extends BaseWxPayResult {
+public class WxPayQueryExchangeRateResult extends BaseWxPayResult implements Serializable {
   private static final long serialVersionUID = 2269734222658532364L;
 
   /**
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayRedpackQueryResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayRedpackQueryResult.java
index 90f9a70e4..88a1f3e4e 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayRedpackQueryResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayRedpackQueryResult.java
@@ -23,7 +23,7 @@ import java.util.List;
 @EqualsAndHashCode(callSuper = true)
 @NoArgsConstructor
 @XStreamAlias("xml")
-public class WxPayRedpackQueryResult extends BaseWxPayResult {
+public class WxPayRedpackQueryResult extends BaseWxPayResult implements Serializable {
   private static final long serialVersionUID = -3849864122189552906L;
 
   /**
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayRefundCouponInfo.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayRefundCouponInfo.java
index 290e47231..5db5c0581 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayRefundCouponInfo.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayRefundCouponInfo.java
@@ -5,6 +5,8 @@ import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
+import java.io.Serializable;
+
 /**
  * <pre>
  *  退款代金券信息.
@@ -16,7 +18,8 @@ import lombok.NoArgsConstructor;
 @Data
 @NoArgsConstructor
 @AllArgsConstructor
-public class WxPayRefundCouponInfo {
+public class WxPayRefundCouponInfo implements Serializable {
+  private static final long serialVersionUID = -8493640819570138722L;
   /**
    * <pre>
    * 字段名：退款代金券ID.
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayRefundQueryResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayRefundQueryResult.java
index fe17e1477..d67edc1ab 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayRefundQueryResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayRefundQueryResult.java
@@ -1,21 +1,18 @@
 package com.github.binarywang.wxpay.bean.result;
 
-import java.util.List;
-
 import com.google.common.collect.Lists;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonParser;
 import com.google.gson.reflect.TypeToken;
 import com.thoughtworks.xstream.annotations.XStreamAlias;
-import lombok.AllArgsConstructor;
-import lombok.Builder;
-import lombok.Data;
-import lombok.EqualsAndHashCode;
-import lombok.NoArgsConstructor;
+import lombok.*;
 import me.chanjar.weixin.common.util.json.WxGsonBuilder;
 import org.apache.commons.lang3.StringUtils;
 import org.w3c.dom.Document;
 
+import java.io.Serializable;
+import java.util.List;
+
 /**
  * <pre>
  * 微信支付-退款查询返回结果
@@ -28,7 +25,8 @@ import org.w3c.dom.Document;
 @EqualsAndHashCode(callSuper = true)
 @NoArgsConstructor
 @XStreamAlias("xml")
-public class WxPayRefundQueryResult extends BaseWxPayResult {
+public class WxPayRefundQueryResult extends BaseWxPayResult implements Serializable {
+  private static final long serialVersionUID = 5392369423225328754L;
   /**
    * <pre>
    * 字段名：设备号.
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPaySandboxSignKeyResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPaySandboxSignKeyResult.java
index afc8a94e0..aec190364 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPaySandboxSignKeyResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPaySandboxSignKeyResult.java
@@ -6,6 +6,8 @@ import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import org.w3c.dom.Document;
 
+import java.io.Serializable;
+
 /**
  * <pre>
  *  Created by BinaryWang on 2017/6/18.
@@ -17,8 +19,8 @@ import org.w3c.dom.Document;
 @EqualsAndHashCode(callSuper = true)
 @NoArgsConstructor
 @XStreamAlias("xml")
-public class WxPaySandboxSignKeyResult extends BaseWxPayResult {
-
+public class WxPaySandboxSignKeyResult extends BaseWxPayResult implements Serializable {
+  private static final long serialVersionUID = -5793375529340378941L;
   /**
    * <pre>
    * 沙箱密钥
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPaySendMiniProgramRedpackResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPaySendMiniProgramRedpackResult.java
index a3ac787cf..f461e27b6 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPaySendMiniProgramRedpackResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPaySendMiniProgramRedpackResult.java
@@ -18,6 +18,7 @@ import java.io.Serializable;
 @NoArgsConstructor
 @XStreamAlias("xml")
 public class WxPaySendMiniProgramRedpackResult extends BaseWxPayResult implements Serializable {
+  private static final long serialVersionUID = 5847928569755121611L;
   /**
    * 商户订单号.
    */
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayShorturlResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayShorturlResult.java
index 6b692ec08..da1c97d7d 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayShorturlResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayShorturlResult.java
@@ -6,6 +6,8 @@ import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import org.w3c.dom.Document;
 
+import java.io.Serializable;
+
 /**
  * <pre>
  * 转换短链接结果对象类
@@ -18,7 +20,8 @@ import org.w3c.dom.Document;
 @EqualsAndHashCode(callSuper = true)
 @NoArgsConstructor
 @XStreamAlias("xml")
-public class WxPayShorturlResult extends BaseWxPayResult {
+public class WxPayShorturlResult extends BaseWxPayResult implements Serializable {
+  private static final long serialVersionUID = -2121902492357304418L;
   /**
    * <pre>
    * URL链接
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderResult.java
index 60d7e7f01..eec2e37fe 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderResult.java
@@ -6,6 +6,8 @@ import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import org.w3c.dom.Document;
 
+import java.io.Serializable;
+
 /**
  * <pre>
  * 在发起微信支付前，需要调用统一下单接口，获取"预支付交易会话标识"返回的结果
@@ -18,7 +20,8 @@ import org.w3c.dom.Document;
 @EqualsAndHashCode(callSuper = true)
 @NoArgsConstructor
 @XStreamAlias("xml")
-public class WxPayUnifiedOrderResult extends BaseWxPayResult {
+public class WxPayUnifiedOrderResult extends BaseWxPayResult implements Serializable {
+  private static final long serialVersionUID = -4006038483273621997L;
 
   /**
    * 微信生成的预支付回话标识，用于后续接口调用中使用，该值有效期为2小时