diff --git a/server/light_backtask/task/chain_activity.go b/server/light_backtask/task/chain_activity.go
index 0438b7eb..04bdc98b 100644
--- a/server/light_backtask/task/chain_activity.go
+++ b/server/light_backtask/task/chain_activity.go
@@ -119,11 +119,15 @@ func (this* chainActivity) saveToDb(ds *f5.DataSet) bool {
 		}
 	} else if eventName == "UnLock" {
 		p := new(unLockReturnValues)
+		sender := q5.SafeToString(p.User)
 		if q5.DecodeJson(returnValues, p) == nil {
 			for _, nft := range p.NftList {
 				tokenId := q5.SafeToString(nft[0])
-				sender := q5.SafeToString(nft[1])
 				to := q5.SafeToString(nft[1])
+				isMint := 0
+				if nft[2].(bool) {
+					isMint = 1
+				}
 				f5.GetGoStyleDb().Upsert(
 					constant.BCEVENT_DB,
 					"t_chain_activity",
@@ -148,6 +152,7 @@ func (this* chainActivity) saveToDb(ds *f5.DataSet) bool {
 						{"src_idx", idx},
 						{"sender_address", strings.ToLower(sender)},
 						{"to_address", strings.ToLower(to)},
+						{"is_mint", q5.ToString(isMint)},
 						{"createtime", createTime},
 						{"modifytime", modifyTime},
 					},