diff --git a/src/main/java/examples/IdentityDumpExample.java b/src/main/java/examples/IdentityDumpExample.java
index 06e07f3..29a695d 100644
--- a/src/main/java/examples/IdentityDumpExample.java
+++ b/src/main/java/examples/IdentityDumpExample.java
@@ -1,5 +1,11 @@
 package examples;
 
+import security.SafeBag;
+import util.FileUtil;
+
+import java.io.IOException;
+import java.util.Arrays;
+
 /*
  * @Author: Wang Feng
  * @Description: 测试身份的导入导出
@@ -20,22 +26,76 @@ public class IdentityDumpExample {
      * @param username
      * @param identityPath
      */
-    public void generateForeverIdentity(String username,String identityPath){
+    private void generateForeverIdentity(String username,String identityPath){
         // identityName是将username前面加上"/"
         String identityName="/"+username;
         KeyManagerExample.INSTANCE.initKeyChain(identityName,identityPath);
     }
 
-    public static void main(String[] args){
+    /**
+     * 测试导出用户身份
+     */
+    private void exportIdentity(){
         // 生成数据库身份
         new IdentityDumpExample().generateForeverIdentity(username,identityPath);
+        System.out.println("生成的用户身份: "+KeyManagerExample.INSTANCE
+                .getIdentity("/"+username,identityPath));
         // 导出数据库身份
+        SafeBag safeBag;
         try {
-            KeyManagerExample.INSTANCE.getKeyChain().exportSafeBag("");
+            safeBag=KeyManagerExample.INSTANCE.getKeyChain().exportSafeBag("");
+            System.out.println(Arrays.toString(safeBag.getValue()));
         } catch (Exception e) {
             e.printStackTrace();
+            return;
+        }
+        // 将身份数据写入本地文件
+        try {
+            FileUtil.writeFile(identityFilePath,safeBag.getValue());
+        } catch (IOException e) {
+            e.printStackTrace();
         }
     }
 
+    /**
+     * 测试导入用户身份
+     */
+    private void importIdentity(){
+        // 导入身份前查看是否有该用户身份
+//        System.out.println("试图取出未导入的用户身份: "+KeyManagerExample.INSTANCE
+//                .getIdentity("/"+username,identityPath));
+        // 从本地文件中读取身份数据
+        byte[] identityBytes;
+        try {
+            identityBytes=FileUtil.readFile(identityFilePath);
+        } catch (IOException e) {
+            e.printStackTrace();
+            return;
+        }
+        // 转成SafeBag
+        SafeBag safeBag=new SafeBag(identityBytes);
+        // 导入到本地身份数据库中
+        try {
+            KeyManagerExample.INSTANCE.getKeyChain().importSafeBag(safeBag,"",true);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        // 导入身份后查看是否有该用户身份
+        System.out.println("查看是否成功导入用户身份: "+KeyManagerExample.INSTANCE
+                .getIdentity("/"+username,identityPath));
+    }
+
+    public static void main(String[] args){
+        // 初始化KeyManager
+        KeyManagerExample.INSTANCE.initKeyChain("/default",identityPath);
+        // 测试生成并导出用户身份
+//        new IdentityDumpExample().exportIdentity();
+        // 测试导入用户身份
+        System.out.println("当前用户身份: "+
+                KeyManagerExample.INSTANCE.getKeyChain().getCurrentIdentity().getName());
+        new IdentityDumpExample().importIdentity();
+        System.out.println("当前用户身份: "+
+                KeyManagerExample.INSTANCE.getKeyChain().getCurrentIdentity().getName());
+    }
 
 }
diff --git a/src/main/java/examples/VPNLoginExample.java b/src/main/java/examples/VPNLoginExample.java
index 221bf29..331147f 100644
--- a/src/main/java/examples/VPNLoginExample.java
+++ b/src/main/java/examples/VPNLoginExample.java
@@ -234,9 +234,9 @@ public class VPNLoginExample {
 
     // 测试注册登录
     public static void main(String[] args){
-        new VPNLoginExample().testRegister();
-//        new VPNLoginExample().testLogin();
-//        VpnServerInfoListExample infoList = new VPNLoginExample().testGetVPNInfo();
-//        System.out.println(infoList);
+//        new VPNLoginExample().testRegister();
+////        new VPNLoginExample().testLogin();
+        VpnServerInfoListExample infoList = new VPNLoginExample().testGetVPNInfo();
+        System.out.println(infoList);
     }
 }
diff --git a/src/main/java/mgmt/CommandExecutor.java b/src/main/java/mgmt/CommandExecutor.java
index f3962af..65be528 100644
--- a/src/main/java/mgmt/CommandExecutor.java
+++ b/src/main/java/mgmt/CommandExecutor.java
@@ -147,6 +147,18 @@ public class CommandExecutor {
             if(this.keyChain!=null){
                 this.keyChain.signInterest(interest);
             }
+            // 测试字段-------------------
+            System.out.println("CommandExecutor-构造的兴趣包的签名字段: "+
+                    Arrays.toString(interest.minPacket.signatureField.getSignature(0)
+                            .getSigValue().getValue()));
+            Encoder encoder=new Encoder();
+            if(!encoder.encoderReset(new SizeT(Encoder.MaxPacketSize),new SizeT(0))){
+                System.out.println("fucking test");
+            }
+            int bufLen=interest.wireEncode(encoder);
+            byte[] buf=encoder.getBuffer();
+            System.out.println("CommandExecutor-构造的兴趣包的最终形态: "+ Arrays.toString(buf));
+            // 测试字段---------------------
             return interest;
         } catch (Exception e) {
             throw new MgmtException("CommandExecutor.newCommandInterest: "+e.getMessage());
@@ -257,11 +269,16 @@ public class CommandExecutor {
 
             // 打印输出
             try {
-                System.out.println(Arrays.toString(new SelfEncodingBase()
+                System.out.println("旧的输出【最最终形态】: "+Arrays.toString(new SelfEncodingBase()
                         .selfWireEncode(commandInterest).getRaw()));
-            } catch (EncoderException e) {
-                e.printStackTrace();
-            } catch (BlockException e) {
+                Encoder encoder=new Encoder();
+                if(!encoder.encoderReset(new SizeT(Encoder.MaxPacketSize),new SizeT(0))){
+                    System.out.println("fucking test");
+                }
+                int bufLen=commandInterest.wireEncode(encoder);
+                byte[] buf=encoder.getBuffer();
+                System.out.println("新的输出【最最终形态】: "+ Arrays.toString(buf));
+            } catch (EncoderException | BlockException e) {
                 e.printStackTrace();
             }
 
@@ -273,11 +290,9 @@ public class CommandExecutor {
             // 等待兴趣包应答
             MINPacket minPacket=this.logicFace.receivePacket(commandInterest.interestLifeTime.getInterestLifeTime());
             try {
-                System.out.println(Arrays.toString(new SelfEncodingBase()
+                System.out.println("收到的注册应答包："+Arrays.toString(new SelfEncodingBase()
                         .selfWireEncode(minPacket).getRaw()));
-            } catch (EncoderException e) {
-                e.printStackTrace();
-            } catch (BlockException e) {
+            } catch (EncoderException | BlockException e) {
                 e.printStackTrace();
             }
 
diff --git a/src/main/java/minsecurity/identity/IdentityUtil.java b/src/main/java/minsecurity/identity/IdentityUtil.java
index 73cdee6..581e13d 100644
--- a/src/main/java/minsecurity/identity/IdentityUtil.java
+++ b/src/main/java/minsecurity/identity/IdentityUtil.java
@@ -24,9 +24,14 @@ import java.security.NoSuchProviderException;
  * @Copyright: MIN-Group；国家重大科技基础设施——未来网络北大实验室；深圳市信息论与未来网络重点实验室
  */
 public class IdentityUtil {
+    // 标记在导入导出用户身份时，是否要忽略掉证书。false表示忽略掉
+    private static boolean haveUsedCert = false;
+
     /**
      * 将identity转化为内部结构(innerIdentity), 便于编码
      * identity的公私钥以及证书都不能为空
+     * => wefree: 为了保证客户端程序在没有接收区块链后台颁发的证书时，仍然能够导出身份，
+     *     这里将默认导出不包含证书的身份。
      * @param identity
      * @return minsecurity.identity.InnerIdentity
      * @throws CertException ...
@@ -37,19 +42,27 @@ public class IdentityUtil {
             throws NoSuchPaddingException, InvalidKeyException, CertException,
             IllegalBlockSizeException, BadPaddingException, NoSuchAlgorithmException,
             NoSuchProviderException, InvalidAlgorithmParameterException, IdentityException {
-        if(identity.getPubkey() == null)
+        if (identity.getPubkey() == null)
             throw new IdentityException("public key in identity is null");
-        if(identity.getPrikey() == null)
+        if (identity.getPrikey() == null)
             throw new IdentityException("private key in identity is null");
-        if(identity.getCert() == null)
-            throw new IdentityException("certificate in identity is null");
+        if (identity.getCert() == null)
+            if (haveUsedCert) {
+                throw new IdentityException("certificate in identity is null");
+            } else{
+                System.out.println("certificate in identity is null");
+            }
         InnerIdentity innerIdentity = new InnerIdentity();
         innerIdentity.setName(identity.getName());
         innerIdentity.setKeyParam(identity.getKeyParam());
         innerIdentity.setPrikey(identity.getPrikey().getBytes());
         innerIdentity.setPubkey(identity.getPubkey().getBytes());
         innerIdentity.setPasswd(identity.getPasswd());
-        innerIdentity.setCert(CertUtils.toPem(identity.getCert(), identity.getPasswd().getBytes(), Common.SM4CBC));
+        if(haveUsedCert) {
+            innerIdentity.setCert(CertUtils.toPem(identity.getCert(), identity.getPasswd().getBytes(), Common.SM4CBC));
+        }else {
+            innerIdentity.setCert(null);
+        }
         // add
         innerIdentity.setPrikeyRawByte(identity.getPrikeyRawByte());
         return innerIdentity;
@@ -82,12 +95,15 @@ public class IdentityUtil {
                 KeyUtils.unMarshalPrivateKey(innerIdentity.getPrikey(), innerIdentity.getKeyParam().PublicKeyAlgorithm);
         identity.setPrikey(priv);
         identity.setPasswd(innerIdentity.getPasswd());
-        Certificate certificate =
-                CertUtils.fromPem(innerIdentity.getCert(), innerIdentity.getPasswd().getBytes(), Common.SM4CBC);
-        identity.setCert(certificate);
+        if(haveUsedCert) {
+            Certificate certificate =
+                    CertUtils.fromPem(innerIdentity.getCert(), innerIdentity.getPasswd().getBytes(), Common.SM4CBC);
+            identity.setCert(certificate);
+        }else{
+            identity.setCert(null);
+        }
         identity.setPrikeyRawByte(innerIdentity.getPrikeyRawByte());
         return identity;
     }
 
-
 }
diff --git a/src/main/java/security/KeyChain.java b/src/main/java/security/KeyChain.java
index dfa8e68..c2c9a90 100644
--- a/src/main/java/security/KeyChain.java
+++ b/src/main/java/security/KeyChain.java
@@ -347,6 +347,12 @@ public class KeyChain {
             throw new KeyChainException("SafeBag is null");
         Identity identity = Identity.load(safeBag.getValue(), passwd);
 
+        // 测试代码
+        if(this.identityManager.existIdentity(identity.getName())){
+            System.out.println("已存在该身份: "+identity.getName());
+            System.out.println("已存在该身份: "+identity);
+        }
+
         if (!this.identityManager.existIdentity(identity.getName()) || force){
             this.identityManager.saveIdentity(identity, force, false);
         }else {