diff --git a/src/Luban.Job.Cfg/Source/DataSources/Excel/ExcelDataSource.cs b/src/Luban.Job.Cfg/Source/DataSources/Excel/ExcelDataSource.cs
index f53656e..1e70c6f 100644
--- a/src/Luban.Job.Cfg/Source/DataSources/Excel/ExcelDataSource.cs
+++ b/src/Luban.Job.Cfg/Source/DataSources/Excel/ExcelDataSource.cs
@@ -26,7 +26,7 @@ namespace Luban.Job.Cfg.DataSources.Excel
             fs.Seek(0, SeekOrigin.Begin);
             if (cdet.Charset != null)
             {
-                Console.WriteLine("Charset: {0}, confidence: {1}", cdet.Charset, cdet.Confidence);
+                s_logger.Debug("Charset: {}, confidence: {}", cdet.Charset, cdet.Confidence);
                 return System.Text.Encoding.GetEncoding(cdet.Charset) ?? System.Text.Encoding.Default;
             }
             else
diff --git a/src/Luban.Job.Cfg/Source/JobController.cs b/src/Luban.Job.Cfg/Source/JobController.cs
index 36c7adc..cf0964e 100644
--- a/src/Luban.Job.Cfg/Source/JobController.cs
+++ b/src/Luban.Job.Cfg/Source/JobController.cs
@@ -680,7 +680,7 @@ namespace {ctx.TopModule}
 
                 var content = FileHeaderUtil.ConcatAutoGenerationHeader(string.Join('\n', headerFileContent), ELanguage.CPP);
                 var file = "gen_types.h";
-                var md5 = CacheFileUtil.GenMd5AndAddCache(file, content);
+                var md5 = CacheFileUtil.GenMd5AndAddCache(file, content, true);
                 ctx.GenCodeFilesInOutputCodeDir.Add(new FileInfo() { FilePath = file, MD5 = md5 });
             }));
 
@@ -698,7 +698,7 @@ namespace {ctx.TopModule}
                         render.RenderStub(ctx.TopModule, beanTypes.GetRange(startIndex, Math.Min(TYPE_PER_STUB_FILE, beanTypes.Count - startIndex))),
                         ELanguage.CPP);
                     var file = $"gen_stub_{index}.cpp";
-                    var md5 = CacheFileUtil.GenMd5AndAddCache(file, content);
+                    var md5 = CacheFileUtil.GenMd5AndAddCache(file, content, true);
                     ctx.GenCodeFilesInOutputCodeDir.Add(new FileInfo() { FilePath = file, MD5 = md5 });
                 }));
             }
@@ -716,7 +716,7 @@ namespace {ctx.TopModule}
                 {
                     var content = FileHeaderUtil.ConcatAutoGenerationHeader(render.RenderAny(c), ELanguage.CPP);
                     var file = "editor_" + RenderFileUtil.GetUeCppDefTypeHeaderFilePath(c.FullName);
-                    var md5 = CacheFileUtil.GenMd5AndAddCache(file, content);
+                    var md5 = CacheFileUtil.GenMd5AndAddCache(file, content, true);
                     ctx.GenCodeFilesInOutputCodeDir.Add(new FileInfo() { FilePath = file, MD5 = md5 });
                 }));
             }
@@ -733,7 +733,7 @@ namespace {ctx.TopModule}
                         render.RenderStub(renderTypes.GetRange(startIndex, Math.Min(TYPE_PER_STUB_FILE, renderTypes.Count - startIndex))),
                         ELanguage.CPP);
                     var file = $"stub_{index}.cpp";
-                    var md5 = CacheFileUtil.GenMd5AndAddCache(file, content);
+                    var md5 = CacheFileUtil.GenMd5AndAddCache(file, content, true);
                     ctx.GenCodeFilesInOutputCodeDir.Add(new FileInfo() { FilePath = file, MD5 = md5 });
                 }));
             }
@@ -768,7 +768,7 @@ namespace {ctx.TopModule}
                 {
                     var content = FileHeaderUtil.ConcatAutoGenerationHeader(render.RenderAny(c), ELanguage.CPP);
                     var file = "bp_" + RenderFileUtil.GetUeCppDefTypeHeaderFilePath(c.FullName);
-                    var md5 = CacheFileUtil.GenMd5AndAddCache(file, content);
+                    var md5 = CacheFileUtil.GenMd5AndAddCache(file, content, true);
                     ctx.GenCodeFilesInOutputCodeDir.Add(new FileInfo() { FilePath = file, MD5 = md5 });
                 }));
             }
diff --git a/src/Luban.Job.Common/Source/Utils/CacheFileUtil.cs b/src/Luban.Job.Common/Source/Utils/CacheFileUtil.cs
index b602ffc..afaf6fa 100644
--- a/src/Luban.Job.Common/Source/Utils/CacheFileUtil.cs
+++ b/src/Luban.Job.Common/Source/Utils/CacheFileUtil.cs
@@ -1,6 +1,7 @@
 using Luban.Common.Protos;
 using Luban.Common.Utils;
 using Luban.Server.Common;
+using System;
 using System.Threading.Tasks;
 
 namespace Luban.Job.Common.Utils
@@ -35,10 +36,22 @@ namespace Luban.Job.Common.Utils
             }
         }
 
-        public static string GenMd5AndAddCache(string fileName, string content)
+        public static string GenMd5AndAddCache(string fileName, string content, bool withUtf8Bom = false)
         {
             content = content.Replace("\r\n", "\n");
-            var bytes = System.Text.Encoding.UTF8.GetBytes(content);
+            byte[] bytes;
+            if (!withUtf8Bom)
+            {
+                bytes = System.Text.Encoding.UTF8.GetBytes(content);
+            }
+            else
+            {
+                bytes = new byte[System.Text.Encoding.UTF8.GetByteCount(content) + 3 /* bom header */];
+                bytes[0] = 0xef;
+                bytes[1] = 0xbb;
+                bytes[2] = 0xbf;
+                System.Text.Encoding.UTF8.GetBytes(content, bytes.AsSpan(3));
+            }
             var md5 = FileUtil.CalcMD5(bytes);
             CacheManager.Ins.AddCache(fileName, md5, bytes);
             return md5;