diff --git a/codes/postprocess.py b/codes/postprocess.py
index bfc1578..0ea1333 100755
--- a/codes/postprocess.py
+++ b/codes/postprocess.py
@@ -33,9 +33,9 @@ def database():
     drug_mechanism_df = pd.read_csv(drug_mechanism_path, usecols=list(range(18)), sep='\t')
     drug_mechanism_df = drug_mechanism_df.fillna('.')
     drug_mechanism_df['drugs'] = drug_mechanism_df.apply(lambda x: '|'.join(
-        [tm.upper() for tm in [x['药物名称-英文'], x['药物名称-中文']] if tm != '.']), axis=1)
+        [tm for tm in [x['药物名称-英文'], x['药物名称-中文']] if tm != '.']), axis=1)
     drug_mechanism_df['dec'] = drug_mechanism_df.apply(lambda x: "||".join(
-        [tm.upper() for tm in [x['适应症（中文）'], x['作用机制-中文']] if tm != '.']), axis=1)
+        [tm for tm in [x['适应症（中文）'], x['作用机制-中文']] if tm != '.']), axis=1)
     # return {drugA: drugAdes\\\\drugAdes中文， drugA中文: drugAdes\\\\drugAdes中文，}
     drug_mechanism = {}
     for _, row in drug_mechanism_df.iterrows():