diff --git a/app/api/v1/app_valuations/app_valuations.py b/app/api/v1/app_valuations/app_valuations.py
index 86fbb89..95c7de4 100644
--- a/app/api/v1/app_valuations/app_valuations.py
+++ b/app/api/v1/app_valuations/app_valuations.py
@@ -19,6 +19,7 @@ from app.schemas.valuation import (
 from app.schemas.base import Success, SuccessExtra
 from app.utils.app_user_jwt import get_current_app_user_id, get_current_app_user
 from app.utils.calculation_engine import FinalValueACalculator
+from app.utils.calculation_engine.cultural_value_b2.sub_formulas.living_heritage_b21 import cross_border_depth_dict
 from app.utils.calculation_engine.drp import DynamicPledgeRateCalculator
 from app.utils.calculation_engine.economic_value_b1.sub_formulas.basic_value_b11 import calculate_popularity_score, \
     calculate_infringement_score, calculate_patent_usage_score, calculate_patent_score