diff --git a/site_direct.go b/site_direct.go
index 444c184..890e571 100644
--- a/site_direct.go
+++ b/site_direct.go
@@ -102,6 +102,7 @@ var directDomainList = []string{
 	"bing.com.cn",
 	"baidu.com",
 	"bdstatic.com",
+	"bdimg.com",
 	"youdao.com",
 	"sogou.com",
 
diff --git a/sitestat.go b/sitestat.go
index 5b802dd..8202959 100644
--- a/sitestat.go
+++ b/sitestat.go
@@ -73,7 +73,7 @@ func (vc *VisitCnt) userSpecified() bool {
 	return vc.Blocked == userCnt || vc.Direct == userCnt
 }
 
-const siteStaleThreshold = 30 * 24 * time.Hour
+const siteStaleThreshold = 15 * 24 * time.Hour
 
 // shouldDrop returns true if the a VisitCnt is not visited for a long time
 // (several days) or is specified by user.