diff --git a/src/xtquant/__init__.py b/src/xtquant/__init__.py
index 53ba8ab..afd593c 100644
--- a/src/xtquant/__init__.py
+++ b/src/xtquant/__init__.py
@@ -2,10 +2,6 @@
 
 __version__ = "xtquant"
 
-from . import xtpythonclient
-from . import xttype
-from . import xtconstant
-from . import xttrader
 
 
 def check_for_update(package_name):