diff --git a/src/api/mod.rs b/src/api/mod.rs
index ab53a09..f3a06ff 100644
--- a/src/api/mod.rs
+++ b/src/api/mod.rs
@@ -105,12 +105,17 @@ impl<'r> FromRequest<'r> for CurrentUser {
                     let db = try_outcome!(request.guard::<Db>().await);
                     if let Some(u) = User::get_by_token(&db, &rconn, token).await {
                         let namehash = rh.hash_with_salt(&u.name);
+                        let user_base = CurrentUser::from_hash(&rconn, namehash).await;
                         Some(CurrentUser {
                             id: Some(u.id),
                             is_admin: u.is_admin
-                                || is_elected_admin(&rconn, &namehash).await.unwrap(),
-                            is_candidate: is_elected_candidate(&rconn, &namehash).await.unwrap(),
-                            ..CurrentUser::from_hash(&rconn, namehash).await
+                                || is_elected_admin(&rconn, &user_base.custom_title)
+                                    .await
+                                    .unwrap(),
+                            is_candidate: is_elected_candidate(&rconn, &user_base.custom_title)
+                                .await
+                                .unwrap(),
+                            ..user_base
                         })
                     } else {
                         None
diff --git a/src/api/post.rs b/src/api/post.rs
index c65e6ed..960919f 100644
--- a/src/api/post.rs
+++ b/src/api/post.rs
@@ -177,6 +177,8 @@ pub async fn get_list(
         "count": ps_data.len(),
         "custom_title": user.custom_title,
         "title_secret": user.title_secret,
+        "is_admin": user.is_admin,
+        "is_candidate": user.is_candidate,
         "auto_block_rank": user.auto_block_rank,
         "announcement": get_announcement(&rconn).await?,
         "code": 0
diff --git a/src/api/systemlog.rs b/src/api/systemlog.rs
index f399360..068b287 100644
--- a/src/api/systemlog.rs
+++ b/src/api/systemlog.rs
@@ -1,7 +1,7 @@
 use crate::api::{CurrentUser, JsonApi};
 use crate::random_hasher::RandomHasher;
 use crate::rds_conn::RdsConn;
-use crate::rds_models::Systemlog;
+use crate::rds_models::{get_admin_list, get_candidate_list, Systemlog};
 use rocket::serde::json::{json, Value};
 use rocket::State;
 
@@ -14,6 +14,8 @@ pub async fn get_systemlog(user: CurrentUser, rh: &State<RandomHasher>, rconn: R
         "salt": look!(rh.salt),
         "start_time": rh.start_time.timestamp(),
         "custom_title": user.custom_title,
+        "admin_list": get_admin_list(&rconn).await?,
+        "candidate_list": get_candidate_list(&rconn).await?,
         "data": logs.into_iter().map(|log|
             json!({
                 "type": log.action_type,
diff --git a/src/rds_models.rs b/src/rds_models.rs
index 488eda4..4d6111e 100644
--- a/src/rds_models.rs
+++ b/src/rds_models.rs
@@ -233,9 +233,17 @@ impl CustomTitle {
             Err(PolicyError::TitleUsed)?
         } else {
             let ori_secret: Option<String> = rconn.get(KEY_TITLE_SECRET!(title)).await?;
+            if ori_secret.is_none() {
+                clear_title_from_admins(&rconn, title).await?;
+            }
             ori_secret
                 .map_or(Some(()), |s| (s.eq(&secret).then_some(())))
                 .ok_or(PolicyError::TitleProtected)?;
+
+            let old_title: Option<String> = rconn.hget(KEY_CUSTOM_TITLE, namehash).await?;
+            if let Some(t) = old_title {
+                clear_title_from_admins(&rconn, &t).await?;
+            }
             rconn.hset(KEY_CUSTOM_TITLE, namehash, title).await?;
             rconn.hset(KEY_CUSTOM_TITLE, title, namehash).await?;
             Ok(Self::gen_and_set_secret(&rconn, title).await?)
@@ -332,12 +340,33 @@ pub async fn get_announcement(rconn: &RdsConn) -> RedisResult<Option<String>> {
     rconn.clone().get(KEY_ANNOUNCEMENT).await
 }
 
-pub async fn is_elected_candidate(rconn: &RdsConn, namehash: &str) -> RedisResult<bool> {
-    rconn.clone().sismember(KEY_CANDIDATE, namehash).await
+pub async fn is_elected_candidate(rconn: &RdsConn, title: &str) -> RedisResult<bool> {
+    if title.is_empty() {
+        return Ok(false);
+    }
+    rconn.clone().sismember(KEY_CANDIDATE, title).await
+}
+
+pub async fn is_elected_admin(rconn: &RdsConn, title: &str) -> RedisResult<bool> {
+    if title.is_empty() {
+        return Ok(false);
+    }
+    rconn.clone().sismember(KEY_ADMIN, title).await
+}
+
+pub async fn get_admin_list(rconn: &RdsConn) -> RedisResult<Vec<String>> {
+    rconn.clone().smembers(KEY_ADMIN).await
+}
+
+pub async fn get_candidate_list(rconn: &RdsConn) -> RedisResult<Vec<String>> {
+    rconn.clone().smembers(KEY_CANDIDATE).await
 }
 
-pub async fn is_elected_admin(rconn: &RdsConn, namehash: &str) -> RedisResult<bool> {
-    rconn.clone().sismember(KEY_ADMIN, namehash).await
+pub async fn clear_title_from_admins(rconn: &RdsConn, title: &str) -> RedisResult<()> {
+    let mut rconn = rconn.clone();
+    rconn.srem(KEY_CANDIDATE, title).await?;
+    rconn.srem(KEY_ADMIN, title).await?;
+    Ok(())
 }
 
 pub(crate) use init;