diff --git a/scripts/md_csv/convert_newjson.py b/scripts/md_csv/convert_newjson.py
index 597dadf..538f377 100644
--- a/scripts/md_csv/convert_newjson.py
+++ b/scripts/md_csv/convert_newjson.py
@@ -37,7 +37,27 @@ def convertOldEvent(oldJson):
             assert(numKey in node)
             properties[node[numKey]['en_name']] = properties[numKey]
             del properties[numKey]
-     #end for
+    #end for
+    if 'ext' in properties:
+        ext = properties['ext']
+        if isinstance(ext, str):
+            rawdata = ext.encode('utf8')
+        else:
+            ext = json.dumps(ext)
+            rawdata = ext.encode('utf8')
+        if len(rawdata) <= 1024 * 2:
+            properties['ext1'] = rawdata.decode('utf8')
+        else:
+            assert(len(rawdata) <= 1024 * 4)
+            ext1 = ext[0:2000].encode('utf8')
+            ext2 = ext[2000:].encode('utf8')
+            print(len(ext1), len(ext2), len(rawdata))
+            assert(len(ext1) + len(ext2) == len(rawdata))
+            assert(len(ext1) <= 1024 * 2 and len(ext2) <= 1024 * 2)
+            properties['ext1'] = ext1.decode('utf8')
+            properties['ext2'] = ext2.decode('utf8')
+        #endif
+        del properties['ext']
 
 def convert_newjson(gameid):
     files = getFiles(OLD_PATH + gameid)