diff --git a/xttbinlog/config.yaml b/xttbinlog/config.yaml
index eaad4e8..3847f06 100644
--- a/xttbinlog/config.yaml
+++ b/xttbinlog/config.yaml
@@ -1,7 +1,7 @@
 mysql:
   addr: "127.0.0.1:3306"
-  user: "canal"
-  password: "canal_password"
+  user: "root"
+  password: "root"
   database: "test"
 
 sync:
@@ -14,4 +14,8 @@ sync:
 
 # storage:
 #   type: "redis"
-#   redis_url: "redis://localhost:6379/0"
\ No newline at end of file
+#   redis_url: "redis://localhost:6379/0"
+
+storage:
+  type: "file"
+  file_path: "./position.json"
\ No newline at end of file
diff --git a/xttbinlog/main.go b/xttbinlog/main.go
index f206d5f..80c1cbe 100644
--- a/xttbinlog/main.go
+++ b/xttbinlog/main.go
@@ -34,6 +34,7 @@ func main() {
 	}
 }
 
+// loadConfig 从文件加载配置
 func loadConfig(filename string) (*config.Config, error) {
 	data, err := os.ReadFile(filename)
 	if err != nil {
@@ -49,6 +50,7 @@ func loadConfig(filename string) (*config.Config, error) {
 	return &cfg, nil
 }
 
+// setupSignalHandler 设置信号处理
 func setupSignalHandler(syncer *syncer.DataSyncer) {
 	sigChan := make(chan os.Signal, 1)
 	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
diff --git a/xttbinlog/storage/position_storage.go b/xttbinlog/storage/position_storage.go
index ec49c91..8cba8bd 100644
--- a/xttbinlog/storage/position_storage.go
+++ b/xttbinlog/storage/position_storage.go
@@ -20,6 +20,8 @@ type FileStorage struct {
 	mutex    sync.RWMutex
 }
 
+// NewFileStorage 创建一个新的文件存储实例
+// 1. filePath: 位置信息存储的文件路径
 func NewFileStorage(filePath string) *FileStorage {
 	return &FileStorage{filePath: filePath}
 }
@@ -36,6 +38,9 @@ func (fs *FileStorage) Save(pos mysql.Position) error {
 	return os.WriteFile(fs.filePath, data, 0644)
 }
 
+// Load 从文件加载位置信息
+// 1. 如果文件不存在，返回空位置
+// 2. 如果文件存在，解析JSON数据
 func (fs *FileStorage) Load() (mysql.Position, error) {
 	fs.mutex.RLock()
 	defer fs.mutex.RUnlock()
diff --git a/xttbinlog/syncer/data_syncer.go b/xttbinlog/syncer/data_syncer.go
index e07ea38..a3b673c 100644
--- a/xttbinlog/syncer/data_syncer.go
+++ b/xttbinlog/syncer/data_syncer.go
@@ -19,6 +19,10 @@ type DataSyncer struct {
 	config  *config.Config
 }
 
+// NewDataSyncer 创建一个新的DataSyncer实例
+// 1. 创建canal实例
+// 2. 创建位置存储器
+// 3. 创建事件处理器
 func NewDataSyncer(cfg *config.Config) (*DataSyncer, error) {
 	// 创建canal实例
 	c, err := canal.NewCanal(cfg.ToCanalConfig())
@@ -41,19 +45,23 @@ func NewDataSyncer(cfg *config.Config) (*DataSyncer, error) {
 	}
 
 	// 创建事件处理器
-	eventHandler := handler.NewEventHandler(cfg.Sync.BatchSize, cfg.Sync.Workers)
+	evehalder := handler.NewEventHandler(cfg.Sync.BatchSize, cfg.Sync.Workers)
 
 	syncer := &DataSyncer{
 		canal:   c,
-		handler: eventHandler,
+		handler: evehalder,
 		storage: posStorage,
 		config:  cfg,
 	}
 
-	c.SetEventHandler(eventHandler)
+	// 设置事件处理器 - 这个设置是正确的
+	// c.SetEventHandler(evehalder)
 	return syncer, nil
 }
 
+// Start 启动数据同步
+// 1. 加载保存的位置
+// 2. 启动canal连接
 func (ds *DataSyncer) Start() error {
 	// 加载保存的位置
 	savedPos, err := ds.storage.Load()
@@ -98,6 +106,10 @@ func (ds *DataSyncer) positionSaver() {
 	}
 }
 
+// Stop 停止数据同步
+// 1. 保存最后的位置
+// 2. 关闭事件处理器
+// 3. 关闭canal连接
 func (ds *DataSyncer) Stop() {
 	log.Printf("停止数据同步...")