diff --git a/rdagent/scenarios/data_science/proposal/exp_gen/merge.py b/rdagent/scenarios/data_science/proposal/exp_gen/merge.py
index 723de41e..1e7ca4bf 100644
--- a/rdagent/scenarios/data_science/proposal/exp_gen/merge.py
+++ b/rdagent/scenarios/data_science/proposal/exp_gen/merge.py
@@ -37,10 +37,15 @@ class MergeExpGen(ExpGen):
             heading="A solution that to be merged into previous best solution",
         )
 
-        success_fb_list = trace.experiment_and_feedback_list_after_init(return_type="sota", selection=(leaves[1],))
+        success_fb_list = trace.experiment_and_feedback_list_after_init(
+            return_type="sota", search_type="ancestors", selection=(leaves[1],)
+        )
         if len(success_fb_list) > 0:
             exp_to_merge_fb_desc = T("scenarios.data_science.share:describe.trace").r(
-                exp_and_feedback_list=success_fb_list, type="success", heading="Successful iterations:"
+                exp_and_feedback_list=success_fb_list,
+                type="success",
+                heading="Successful iterations:",
+                success_trial_desc="These trials are the steps or changes that led to the success of the solution to be merged",
             )
         else:
             exp_to_merge_fb_desc = T("scenarios.data_science.share:describe.feedback").r(
diff --git a/rdagent/scenarios/data_science/share.yaml b/rdagent/scenarios/data_science/share.yaml
index 1ec3b3e2..dac88bae 100644
--- a/rdagent/scenarios/data_science/share.yaml
+++ b/rdagent/scenarios/data_science/share.yaml
@@ -31,7 +31,6 @@ describe: # some template to describe some object
   feedback: |-
     {% if exp_and_feedback and exp_and_feedback|length > 1 %}
     ## {{heading | default('Previous trial and feedback')}}
-    Before current trial, a previous recent trial is listed below.
     {% if exp_and_feedback[0].hypothesis %}
     the experiment is designed based on hypothesis: {{ exp_and_feedback[0].hypothesis }}
     {% endif %}
@@ -51,16 +50,9 @@ describe: # some template to describe some object
     ## {{ heading | default('Trace of all trials') }}
     {% endif %}
 
-    Before current trial, several 
+    Before current trial, several {% if type == "success" %}successful{% elif type == "failure" %}failed{% else %}successful or failed{% endif %} trials are listed below.
     {% if type == "success" %}
-    successful
-    {% elif type == "failure" %}
-    failed
-    {% else %}
-    successful or failed
-    {% endif %} trials are listed below.
-    {% if type == "success" %}
-    The current SOTA method is the combination of the best solutions of these trials.
+    {{success_trial_desc | default('The current SOTA method is the combination of the best solutions of these trials.')}}
     {% endif %}
 
     The trace order is from the earliest to the latest. Please focus more on the later trials.