diff --git a/src/main/java/racal/sunyard/main/SydApi4j.java b/src/main/java/racal/sunyard/main/SydApi4j.java
index ef5fcf1..69dbaf0 100644
--- a/src/main/java/racal/sunyard/main/SydApi4j.java
+++ b/src/main/java/racal/sunyard/main/SydApi4j.java
@@ -9053,7 +9053,7 @@ public class SydApi4j implements SydApi {
             keyTpye = "008";
         }
 
-        String key = "XK";
+        String xkkey = "XK";
 
         // 机构号扩展到 16 位
         // 前补 0
@@ -9062,10 +9062,10 @@ public class SydApi4j implements SydApi {
 
         String kid = "00000";
         String v = String.format("%03d", Version);
-        key += gid + keyTpye + kid + v;
+        xkkey += gid + keyTpye + kid + v;
 
         data.put("MACData", Util.bytes2HexString(Data).getBytes());
-        data.put("key", key);
+        data.put("key", xkkey);
         data.put("full", fullFlag);
         data.put("macLen", macLenFlag);
 
@@ -9131,7 +9131,7 @@ public class SydApi4j implements SydApi {
             keyTpye = "008";
         }
 
-        String key = "XK";
+        String xkkey = "XK";
 
         // 机构号扩展到 16 位
         // 前补 0
@@ -9140,12 +9140,12 @@ public class SydApi4j implements SydApi {
 
         String kid = "00000";
         String v = String.format("%03d", Version);
-        key += gid + keyTpye + kid + v;
+        xkkey += gid + keyTpye + kid + v;
 
 
         data.put("MAC", mac);
         data.put("MACData", Util.bytes2HexString(Data).getBytes());
-        data.put("key", key);
+        data.put("key", xkkey);
         data.put("full", fullFlag);
         data.put("macLen", macLenFlag);