diff --git a/src/main/java/com/sunyard/sge/database/SydApiSM4.java b/src/main/java/com/sunyard/sge/database/SydApiSM4.java
index 20a453c..82e468b 100644
--- a/src/main/java/com/sunyard/sge/database/SydApiSM4.java
+++ b/src/main/java/com/sunyard/sge/database/SydApiSM4.java
@@ -44,6 +44,7 @@ public class SydApiSM4 {
                     bufferResult.put(sourceWrap);
                     bufferResult.put(pcData);
                     sourceWrap = bufferResult;
+                    return new byte[0];
                 }
                 if (plength % 16 != 0) {
                     ByteBuffer buffer = ByteBuffer.wrap(pcData);
@@ -99,11 +100,11 @@ public class SydApiSM4 {
         else {
             if (0 == sourceWrap.array().length) {
                 if (plength<16||plength/16<2){
-                    api.SYD_SM4_LongData(iKeyIndex, new byte[0], iPkgNum, iFlag);
                     ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + plength);
                     bufferResult.put(sourceWrap);
                     bufferResult.put(pcData);
                     sourceWrap = bufferResult;
+                    return new byte[0];
                 }
                     ByteBuffer buffer = ByteBuffer.wrap(pcData);
                     int remainder = plength % 16;