diff --git a/webapp/services/FormulaService.php b/webapp/services/FormulaService.php
index d48fb7c1..54eb7ed9 100644
--- a/webapp/services/FormulaService.php
+++ b/webapp/services/FormulaService.php
@@ -53,6 +53,12 @@ class FormulaService extends BaseService {
              (0.8 - ($instanceRank - 1) * 0.25 + $bossReward * 0.2) *
              1/10;
 
+        error_log(json_encode(array(
+            'instanceLevel' => $instanceLevel,
+            'instanceRank' => $instanceRank,
+            'bossReward' => $bossReward,
+            'ceg' => $ceg
+        )));
         return round($ceg);
     }
 
@@ -167,6 +173,7 @@ class FormulaService extends BaseService {
         $heroProbability = min($heroFragmentNum / $onlineNum *
                                $dropRate * ($instanceRankRate + $bossReward*0.2) *
                                pow(2, $todayPveBattleTimes - $todayPveLastGetFragmentBattle - 1), 1);
+        error_log('calcHeroFragmentProbabilityPve:' . $heroProbability . ' dropRate:' . $dropRate);
         error_log(json_encode(func_get_args()));
         return max(0, $heroProbability);
     }