diff --git a/packages/hydrooj/src/handler/api.ts b/packages/hydrooj/src/handler/api.ts
index a40e57a2..8ec81562 100644
--- a/packages/hydrooj/src/handler/api.ts
+++ b/packages/hydrooj/src/handler/api.ts
@@ -107,7 +107,7 @@ class ApiHandler extends Handler {
     }
 
     async get() {
-        const q = decodeURIComponent(this.ctx.request.querystring);
+        const q = decodeURIComponent(this.request.querystring);
         if (q === 'schema') {
             this.response.type = 'application/json';
             this.response.body = { schema: schemaStr };
diff --git a/packages/hydrooj/src/service/layers/base.ts b/packages/hydrooj/src/service/layers/base.ts
index d1a32f35..9817c526 100644
--- a/packages/hydrooj/src/service/layers/base.ts
+++ b/packages/hydrooj/src/service/layers/base.ts
@@ -34,7 +34,9 @@ export default async (ctx, next) => {
         body: ctx.request.body,
         files: ctx.request.files as any,
         query: ctx.query,
+        querystring: ctx.querystring,
         path: ctx.path,
+        originalPath: ctx.originalPath,
         params: ctx.params,
         referer: ctx.request.headers.referer || '',
         json: (ctx.request.headers.accept || '').includes('application/json'),
diff --git a/packages/hydrooj/src/service/server.ts b/packages/hydrooj/src/service/server.ts
index 825292ff..41ab4fbd 100644
--- a/packages/hydrooj/src/service/server.ts
+++ b/packages/hydrooj/src/service/server.ts
@@ -45,7 +45,9 @@ export interface HydroRequest {
     body: any;
     files: Record<string, import('formidable').File>;
     query: any;
+    querystring: string;
     path: string;
+    originalPath: string;
     params: any;
     referer: string;
     json: boolean;
@@ -114,17 +116,18 @@ export class HandlerCommon {
     session: Record<string, any>;
     /** @deprecated */
     domainId: string;
+    ctx: Context = global.app;
 
     constructor(
-        public ctx: KoaContext, public args: Record<string, any>,
+        public context: KoaContext, public args: Record<string, any>,
         public request: HydroRequest, public response: HydroResponse,
         public user: User, public domain: DomainDoc, public UiContext: Record<string, any>,
     ) {
-        this.render = ctx.render.bind(ctx);
-        this.renderHTML = ctx.renderHTML.bind(ctx);
-        this.url = ctx.getUrl.bind(ctx);
-        this.translate = ctx.translate.bind(ctx);
-        this.session = ctx.session;
+        this.render = context.render.bind(context);
+        this.renderHTML = context.renderHTML.bind(context);
+        this.url = context.getUrl.bind(context);
+        this.translate = context.translate.bind(context);
+        this.session = context.session;
         this.domainId = args.domainId;
     }
 
@@ -140,8 +143,8 @@ export class HandlerCommon {
 
     renderTitle(str: string) {
         const name = this.domain?.ui?.name || system.get('server.name');
-        if (this.UiContext.extraTitleContent) return `${this.ctx.translate(str)} - ${this.UiContext.extraTitleContent} - ${name}`;
-        return `${this.ctx.translate(str)} - ${name}`;
+        if (this.UiContext.extraTitleContent) return `${this.translate(str)} - ${this.UiContext.extraTitleContent} - ${name}`;
+        return `${this.translate(str)} - ${name}`;
     }
 
     checkPerm(...args: bigint[]) {
@@ -193,9 +196,9 @@ export class Handler extends HandlerCommon {
             if (error.stack) logger.error(error.stack);
         }
         if (this.user?._id === 0 && (error instanceof PermissionError || error instanceof PrivilegeError)) {
-            this.response.redirect = this.ctx.getUrl('user_login', {
+            this.response.redirect = this.url('user_login', {
                 query: {
-                    redirect: (this.ctx.originalPath || this.request.path) + this.ctx.search,
+                    redirect: (this.context.originalPath || this.request.path) + this.context.search,
                 },
             });
         } else {
@@ -330,10 +333,10 @@ export class ConnectionHandler extends HandlerCommon {
     }
 
     onerror(err: HydroError) {
-        if (err instanceof UserFacingError) err.stack = this.ctx.HydroContext.request.path;
+        if (err instanceof UserFacingError) err.stack = this.request.path;
         if (!(err instanceof NotFoundError)
             && !((err instanceof PrivilegeError || err instanceof PermissionError) && this.user?._id === 0)) {
-            logger.error(`Path:${this.ctx.HydroContext.request.path}, User:${this.user?._id}(${this.user?.uname})`);
+            logger.error(`Path:${this.request.path}, User:${this.user?._id}(${this.user?.uname})`);
             logger.error(err);
         }
         this.send({
diff --git a/packages/import-qduoj/index.ts b/packages/import-qduoj/index.ts
index 648f37ba..45b8d4fc 100644
--- a/packages/import-qduoj/index.ts
+++ b/packages/import-qduoj/index.ts
@@ -135,7 +135,11 @@ class ImportQduojHandler extends Handler {
     }
 }
 
+export const name = 'import-qduoj';
 export async function apply(ctx: Context) {
     ctx.Route('problem_import_qduoj', '/problem/import/qduoj', ImportQduojHandler, PERM.PERM_CREATE_PROBLEM);
     ctx.inject('ProblemAdd', 'problem_import_qduoj', { icon: 'copy', text: 'From QDUOJ Export' });
+    ctx.i18n.load('zh', {
+        'From QDUOJ Export': '从 QDUOJ 导入',
+    });
 }
diff --git a/packages/import-qduoj/locale/zh.yaml b/packages/import-qduoj/locale/zh.yaml
deleted file mode 100644
index 2d0704dd..00000000
--- a/packages/import-qduoj/locale/zh.yaml
+++ /dev/null
@@ -1 +0,0 @@
-From QDUOJ Export: 从 QDUOJ 导入
\ No newline at end of file
diff --git a/packages/import-qduoj/package.json b/packages/import-qduoj/package.json
index 00753a60..441de43e 100644
--- a/packages/import-qduoj/package.json
+++ b/packages/import-qduoj/package.json
@@ -6,8 +6,5 @@
     "repository": "https://github.com/hydro-dev/Hydro.git",
     "author": "undefined <i@undefined.moe>",
     "license": "AGPL-3.0-or-later",
-    "preferUnplugged": true,
-    "dependencies": {
-        "decode-html": "^2.0.0"
-    }
+    "preferUnplugged": true
 }