diff --git a/configs/config.py b/configs/config.py
new file mode 100644
index 0000000..e69de29
diff --git a/configs/config.yml b/configs/config.yml
new file mode 100644
index 0000000..e69de29
diff --git a/src/classes/avatar.py b/src/classes/avatar.py
index 86648e7..79f15be 100644
--- a/src/classes/avatar.py
+++ b/src/classes/avatar.py
@@ -9,9 +9,13 @@ class Gender(Enum):
 
 @dataclass
 class Avatar:
+    """
+    NPC的类。
+    包含了这个角色的一切信息。
+    """
     name: str
     id: int
-    brith_month: Month
+    birth_month: Month
     birth_year: Year
     age: int
     gender: Gender
diff --git a/src/classes/calendar.py b/src/classes/calendar.py
index 53c55be..e590d69 100644
--- a/src/classes/calendar.py
+++ b/src/classes/calendar.py
@@ -1,5 +1,7 @@
+from enum import Enum
 from dataclasses import dataclass
 
+
 class Month(Enum):
     JANUARY = "January"
     FEBRUARY = "February"
diff --git a/src/run.py b/src/run.py
index c0e00af..65e359f 100644
--- a/src/run.py
+++ b/src/run.py
@@ -1 +1,13 @@
-from src.classes.avatar import Avatar
\ No newline at end of file
+from src.classes.avatar import Avatar, Gender
+from src.classes.calendar import Month, Year
+
+avatar = Avatar(
+    name="John Doe",
+    id=1,
+    birth_month=Month.JANUARY,
+    birth_year=Year(2000),
+    age=20,
+    gender=Gender.MALE
+)
+
+print(avatar)
\ No newline at end of file
diff --git a/src/world/world.py b/src/world/world.py
new file mode 100644
index 0000000..a652758
--- /dev/null
+++ b/src/world/world.py
@@ -0,0 +1,15 @@
+
+
+class World:
+    def __init__(self):
+        pass 
+
+    def step(self):
+        """
+        前进一步（每步模拟是一个月时间）
+        结算这个时间内的所有情况。
+        角色行为、世界变化、重大事件、etc。
+        先结算多个角色间互相交互的事件。
+        再去结算单个角色的事件。
+        """
+        pass
\ No newline at end of file