diff --git a/libs/Game_threads/__init__.py b/libs/Game_threads/__init__.py
index 26d0a8f..b49957e 100644
--- a/libs/Game_threads/__init__.py
+++ b/libs/Game_threads/__init__.py
@@ -5,3 +5,4 @@ mail: 3695888@qq.com
 # import folders
 
 # import in this forder
+from libs.Game_threads import calculations
\ No newline at end of file
diff --git a/libs/Game_threads/calculations.py b/libs/Game_threads/calculations.py
new file mode 100644
index 0000000..b4efa3d
--- /dev/null
+++ b/libs/Game_threads/calculations.py
@@ -0,0 +1,17 @@
+"""
+writen by shenjackyuanjie
+mail: 3695888@qq.com
+"""
+
+import libs
+import math
+
+
+def P_C(A, type, B):
+    """
+    formats:
+    type : "*" or "//"(or "/" "\" "\\")
+    A & B list format:docs.basic_config.json:basic_number
+    """
+    C = [0.0, 1, [], []]
+    return C
\ No newline at end of file