diff --git a/examples/example_pfs/main.py b/examples/example_pfs/main.py
index ae20c98..65e247c 100644
--- a/examples/example_pfs/main.py
+++ b/examples/example_pfs/main.py
@@ -141,7 +141,7 @@ class PFSDatasetWorkflow:
                 single_learnware_list,
                 mixture_score,
                 mixture_learnware_list,
-            ) = easy_market.search_learnware(user_info)
+            ) = easy_market.search_learnware(user_info, search_method = "auto")
 
             print(f"search result of user{idx}:")
             print(
diff --git a/learnware/market/easy.py b/learnware/market/easy.py
index 944342d..4865552 100644
--- a/learnware/market/easy.py
+++ b/learnware/market/easy.py
@@ -385,7 +385,7 @@ class EasyMarket(BaseMarket):
         if len(mixture_list) <= 1:
             mixture_list = [learnware_list[sort_by_weight_idx_list[0]]]
             mixture_weight = [1]
-            mmd_dist = user_rkme.dist(mixture_list)
+            mmd_dist = user_rkme.dist(mixture_list[0])
         else:
             if len(mixture_list) > max_search_num:
                 mixture_list = mixture_list[:max_search_num]