diff --git a/pikpakFs.py b/pikpakFs.py
index f4d7a3e..360f243 100644
--- a/pikpakFs.py
+++ b/pikpakFs.py
@@ -59,9 +59,9 @@ class PikpakToken:
         return cls(**data)
 
 class PKVirtFs:
-    def __init__(self, loginCachePath : str = None, proxy : str = None):
+    def __init__(self, loginCachePath : str = None, proxy : str = None, rootId = None):
         self.nodes : Dict[str, VirtFsNode] = {} 
-        self.root = DirNode(None, "", None)
+        self.root = DirNode(rootId, "", None)
         self.currentLocation = self.root
 
         self.loginCachePath = loginCachePath
@@ -130,7 +130,7 @@ class PKVirtFs:
         return None
 
     def GetFatherNode(self, node : VirtFsNode) -> VirtFsNode:
-        if node.fatherId is None:
+        if node is self.root or node.fatherId == self.root.id:
             return self.root
         return self.nodes[node.fatherId]
 
diff --git a/readme.md b/readme.md
index 5251793..193eed4 100644
--- a/readme.md
+++ b/readme.md
@@ -4,5 +4,6 @@
 
 Todo:
 
-- [ ] 实现自定义根路径
-- [ ] 异步输出频率过高会导致卡死，似乎会多创建一个线程
\ No newline at end of file
+- [x] 实现自定义根路径
+- [x] 异步输出频率过高会导致卡死，似乎会多创建一个线程
+- [ ] 实现Task系统，自动刷新文件系统
\ No newline at end of file