diff --git a/controllers/gameTypeController.js b/controllers/gameTypeController.js
index aafa3f8..b465c10 100644
--- a/controllers/gameTypeController.js
+++ b/controllers/gameTypeController.js
@@ -505,11 +505,11 @@ class GameTypeController {
     if (category === '1') {
       // Quiz
       if (questionType === 'text') {
-        sample.question = { text: 'What is the capital of France?' };
+        sample.question = 'What is the capital of France?';
       } else if (questionType === 'image') {
-        sample.question = { image: 'https://example.com/question.jpg' };
+        sample.question = 'image';
       } else {
-        sample.question = { audio: 'https://example.com/question.mp3' };
+        sample.question = 'audio';
       }
 
       // Generate options
@@ -542,9 +542,9 @@ class GameTypeController {
       if (questionType === 'text') {
         sample.question = 'Sắp xếp các chữ cái để tạo thành tên con vật';
       } else if (questionType === 'image') {
-        sample.question = 'https://example.com/question_hint.jpg';
+        sample.question = 'image';
       } else {
-        sample.question = 'https://example.com/question_hint.mp3';
+        sample.question = 'audio';
       }
       
       // Full answer array
@@ -594,8 +594,8 @@ class GameTypeController {
     } else if (category === '3') {
       // Instruction/hint is text
       sample.question = questionType === optionType ? 
-        { instruction: 'Flip and match pairs of cards' } : 
-        { instruction: 'Match items from two groups' };
+        'Flip and match pairs of cards' : 
+        'Match items from two groups';
       
       // Memory/Matching
       for (let i = 0; i < parseInt(count); i++) {
@@ -645,7 +645,7 @@ class GameTypeController {
 
     } else if (category === '4') {
       // Lesson Card - Always return all 4 fields (context, audio, image, meaning)
-      sample.question = { instruction: 'Learn vocabulary with context, audio, image, and meaning' };
+      sample.question = 'Learn vocabulary with context, audio, image, and meaning';
       sample.options = [];
       
       const contexts = [
@@ -693,9 +693,9 @@ class GameTypeController {
       if (questionType === 'text') {
         sample.question = 'Sắp xếp các từ để tạo thành câu hoàn chỉnh';
       } else if (questionType === 'image') {
-        sample.question = 'https://example.com/sentence_question.jpg';
+        sample.question = 'image';
       } else {
-        sample.question = 'https://example.com/sentence_question.mp3';
+        sample.question = 'audio';
       }
       
       // Full answer array (words instead of letters)