diff --git a/tools/t7.py b/tools/t7.py
index dfd418c..798102b 100644
--- a/tools/t7.py
+++ b/tools/t7.py
@@ -269,6 +269,11 @@ class AutoLayout:
         self.chip_barcodei7_recode[chipname].update({item['i7'] for item in library_data['data']})
         self.chip_barcodei5_recode[chipname].update({item['i5'] for item in library_data['data']})
 
+        # 华大的 文库 i7 不能重复，添加N+i7
+        if '华大' in library_data['classification']:
+            self.chip_barcode_recode[chipname].update({'N' * 8 + item['i7'] for item in library_data['data']})
+            # self.chip_barcode_recode[chipname].update({item['i5'] + 'N' * 8 for item in library_data['data']})
+
         self.chip_customer[chipname].add(library_data['customer'])
         self.chip_classification[chipname].add(library_data['classification'])