diff --git a/app/utils/calculation_engine/cultural_value_b2/sub_formulas/living_heritage_b21.py b/app/utils/calculation_engine/cultural_value_b2/sub_formulas/living_heritage_b21.py
index 6c096cb..4bbdbab 100644
--- a/app/utils/calculation_engine/cultural_value_b2/sub_formulas/living_heritage_b21.py
+++ b/app/utils/calculation_engine/cultural_value_b2/sub_formulas/living_heritage_b21.py
@@ -1,4 +1,3 @@
-
 """
 活态传承系数B21计算模块
 
@@ -111,9 +110,15 @@ class LivingHeritageB21Calculator:
         teaching_frequency = offline_score + online_score
         
         return teaching_frequency
+def cross_border_depth_dict(border_depth: str) -> float:
+    cross_border_depth_scores = {
+        "品牌联名": 0.3,
+        "科技载体": 0.5,
+        "国家外交礼品": 1,
+    }
+    return cross_border_depth_scores.get(border_depth, 0.3)
     
 
-
 # 示例使用
 if __name__ == "__main__":
     calculator = LivingHeritageB21Calculator()