diff --git a/packages/unblock-area-limit/src/api/bilibili.ts b/packages/unblock-area-limit/src/api/bilibili.ts
index 774bbbb5..6f53e442 100644
--- a/packages/unblock-area-limit/src/api/bilibili.ts
+++ b/packages/unblock-area-limit/src/api/bilibili.ts
@@ -1,6 +1,7 @@
 import { Async } from "../util/async"
 import { generateMobiPlayUrlParams } from "./biliplus"
 import { Converters } from "../util/converters"
+import { getSsId } from "../util/IndexedDB"
 
 interface SeasonInfo {
     code: number
@@ -627,7 +628,14 @@ export class BiliBiliApi {
     getEpisodeInfoByEpId(ep_id: string) {
         return Async.ajax<EpisodeInfo>('//api.bilibili.com/pgc/season/episode/web/info?' + `ep_id=${ep_id}`)
     }
-    getSeasonInfoByEpSsIdOnThailand(ep_id: string, season_id: string) {
+    async getSeasonInfoByEpSsIdOnThailand(ep_id: string, season_id: string) {
+        if (ep_id != '') {
+            const ssid = await getSsId(parseInt(ep_id))
+            if (ssid != '') {
+                season_id = ssid
+                ep_id = ''
+            }
+        }
         const params = '?' + (ep_id != '' ? `ep_id=${ep_id}` : `season_id=${season_id}`) + `&mobi_app=bstar_a&s_locale=zh_SG`
         const newParams = generateMobiPlayUrlParams(params, 'th')
         return Async.ajax<SeasonInfoOnThailand>(`${this.server}/intl/gateway/v2/ogv/view/app/season?` + newParams)
diff --git a/packages/unblock-area-limit/src/feature/bili/area_limit_for_vue.ts b/packages/unblock-area-limit/src/feature/bili/area_limit_for_vue.ts
index 0ae6a860..35cb5dec 100644
--- a/packages/unblock-area-limit/src/feature/bili/area_limit_for_vue.ts
+++ b/packages/unblock-area-limit/src/feature/bili/area_limit_for_vue.ts
@@ -1,5 +1,6 @@
 import { AppSeasonInfo, BiliBiliApi } from "../../api/bilibili"
 import { BiliPlusApi } from "../../api/biliplus"
+import { getObjectStore, openDb } from "../../util/IndexedDB"
 import { Converters } from "../../util/converters"
 import { cookieStorage } from "../../util/cookie"
 import { util_init } from "../../util/initiator"
@@ -110,7 +111,6 @@ interface TemplateArgs {
     appOnly: boolean,
 }
 
-
 async function fixThailandSeason(ep_id: string, season_id: string) {
     // 部分泰区番剧通过 bangumi 无法取得数据或者数据不完整
     // 通过泰区 api 补全
@@ -128,12 +128,19 @@ async function fixThailandSeason(ep_id: string, season_id: string) {
 
     origin.result.episodes = []
     if (origin.result.modules.length > 0) {
+        var store = getObjectStore(await openDb(), 'ep_id_season_id', 'readwrite')
         origin.result.modules[0].data.episodes.forEach((ep) => {
             ep.episode_status = ep.status
             ep.ep_id = ep.id
             ep.index = ep.title
             ep.index_title = ep.long_title
             origin.result.episodes?.push(ep)
+            if (season_id !== '5551')
+                try {
+                    store.put({ ep_id: ep.id, season_id: season_id })
+                } catch (e) {
+                    log('addSsEpId error', e)
+                }
         })
         origin.result.total = origin.result.modules[0].data.episodes.length
     }
diff --git a/packages/unblock-area-limit/src/util/IndexedDB.ts b/packages/unblock-area-limit/src/util/IndexedDB.ts
new file mode 100644
index 00000000..e468563b
--- /dev/null
+++ b/packages/unblock-area-limit/src/util/IndexedDB.ts
@@ -0,0 +1,58 @@
+const DB_NAME = 'balh';
+const DB_VERSION = 1;
+
+export function openDb() {
+    return new Promise<IDBDatabase>((resolve, reject) => {
+        var req = indexedDB.open(DB_NAME, DB_VERSION);
+        req.onsuccess = function (evt) {
+            resolve(this.result)
+        }
+        req.onerror = function (evt) {
+            reject(evt)
+        }
+
+        req.onupgradeneeded = (evt: IDBVersionChangeEvent) => {
+            var storeEPIDCache = (evt.currentTarget as IDBOpenDBRequest)?.result.createObjectStore(
+                'ep_id_season_id', { keyPath: 'ep_id' })
+            storeEPIDCache.createIndex('season_id', 'season_id', { unique: false })
+        }
+    })
+}
+
+export function getObjectStore(db: IDBDatabase, store_name: string, mode: IDBTransactionMode) {
+    var tx = db.transaction(store_name, mode);
+    return tx.objectStore(store_name);
+}
+
+async function clearObjectStore(store_name: string) {
+    var store = getObjectStore(await openDb(), store_name, 'readwrite');
+    var req = store.clear()
+    req.onerror = function (evt) {
+        console.error("clearObjectStore:", evt);
+    }
+}
+
+export function getBlob(key: any, store: IDBObjectStore, success_callback: (blob: Blob) => void) {
+    var req: IDBRequest = store.get(key)
+    req.onsuccess = async function (evt) {
+        var value = (evt.target as IDBRequest)?.result
+        if (value)
+            success_callback(value)
+    }
+}
+
+export function getSsId(ep_id: number): Promise<string> {
+    return new Promise(async (resolve, reject) => {
+        var store = getObjectStore(await openDb(), 'ep_id_season_id', 'readonly');
+        var req: IDBRequest = store.get(ep_id)
+        req.onsuccess = () => {
+            if (!req.result)
+                resolve('')
+            else
+                resolve(req.result.season_id)
+        }
+        req.onerror = (e) => {
+            reject(e)
+        }
+    })
+}