diff --git a/src/main/java/racal/sunyard/main/SydApi4j.java b/src/main/java/racal/sunyard/main/SydApi4j.java
index a08310f..404860e 100644
--- a/src/main/java/racal/sunyard/main/SydApi4j.java
+++ b/src/main/java/racal/sunyard/main/SydApi4j.java
@@ -2148,7 +2148,7 @@ public class SydApi4j implements SydApi {
             e.printStackTrace();
         }
 
-        System.arraycopy(s, 0, dn, 0, s.length);
+        System.arraycopy(s, 0, dnData, 0, s.length);
 
         // 填充数据
         HashMap<String, Object> packet = new HashMap<String, Object>();
diff --git a/src/test/java/sample/Test4NongxinCW.java b/src/test/java/sample/Test4NongxinCW.java
index bcc6b60..8dd8284 100644
--- a/src/test/java/sample/Test4NongxinCW.java
+++ b/src/test/java/sample/Test4NongxinCW.java
@@ -23,7 +23,7 @@ public class Test4NongxinCW {
 
     private SydApi4j api;
 
-    final String SM2dn = "1C=CN,ST=zz,L=zz,O=zzz,CN=zzzzz";
+    final String SM2dn = "C=CN,ST=zz,L=zz,O=zzz,CN=zzzzz";
 
     byte[] orgData = new byte[100];
 
@@ -110,7 +110,7 @@ public class Test4NongxinCW {
 //        orgData = Hex.decode("80a370b809e8a46ba51211a35d6f0180fea32b4acc97916bc9c517ea6651134c");
 //        byte[] nakedSign1 = api.SYD_NakedSign(SM2dn, (byte[])null, orgData);
 //        System.out.println("SM2签名："+ Util.bytes2HexString(nakedSign1));
-        orgData = new byte[1024];
+        orgData = new byte[4096];
         //裸签
         byte[] nakedSign = api.SYD_NakedSign(orgData,SM2dn);
         System.out.println("SM2签名："+ Util.bytes2HexString(nakedSign));