diff --git a/openlrc/chatbot.py b/openlrc/chatbot.py
index acecda0..e550c7f 100644
--- a/openlrc/chatbot.py
+++ b/openlrc/chatbot.py
@@ -341,7 +341,7 @@ def _get_sleep_time(self, error):
 
 @_register_chatbot
 class GeminiBot(ChatBot):
-    def __init__(self, model_name='gemini-1.5-flash', temperature=1, top_p=1, retry=8, max_async=16, fee_limit=0.8,
+    def __init__(self, model_name='gemini-2.0-flash-exp', temperature=1, top_p=1, retry=8, max_async=16, fee_limit=0.8,
                  proxy=None, base_url_config=None, api_key=None):
         self.temperature = max(0, min(1, temperature))
 
@@ -356,7 +356,7 @@ def __init__(self, model_name='gemini-1.5-flash', temperature=1, top_p=1, retry=
             HarmCategory.HARM_CATEGORY_HATE_SPEECH: HarmBlockThreshold.BLOCK_NONE,
             HarmCategory.HARM_CATEGORY_HARASSMENT: HarmBlockThreshold.BLOCK_NONE,
             HarmCategory.HARM_CATEGORY_SEXUALLY_EXPLICIT: HarmBlockThreshold.BLOCK_NONE,
-            HarmCategory.HARM_CATEGORY_DANGEROUS_CONTENT: HarmBlockThreshold.BLOCK_NONE,
+            HarmCategory.HARM_CATEGORY_DANGEROUS_CONTENT: HarmBlockThreshold.BLOCK_NONE
         }
 
         if proxy:
@@ -423,6 +423,9 @@ async def _create_achat(self, messages: List[Dict], stop_sequences: Optional[Lis
             except (genai.types.BrokenResponseError, genai.types.IncompleteIterationError,
                     genai.types.StopCandidateException) as e:
                 logger.warning(f'{type(e).__name__}: {e}. Retry num: {i + 1}.')
+            except genai.types.generation_types.BlockedPromptException as e:
+                logger.warning(f'Prompt blocked: {e}.\n Retry in 30s.')
+                time.sleep(30)
 
         if not response:
             raise ChatBotException('Failed to create a chat.')
diff --git a/openlrc/models.py b/openlrc/models.py
index 23568ef..97ed1f6 100644
--- a/openlrc/models.py
+++ b/openlrc/models.py
@@ -211,6 +211,17 @@ class Models:
         context_window=1048576
     )
 
+    GEMINI_2_0_FLASH_EXP = ModelInfo(
+        name="gemini-2.0-flash-exp",
+        provider=ModelProvider.GOOGLE,
+        input_price=0,
+        output_price=0,
+        max_tokens=8192,
+        context_window=1048576,
+        vision_support=True,
+        knowledge_cutoff="Aug 2024"
+    )
+
     # Third Party Models
     DEEPSEEK = ModelInfo(
         name="deepseek-chat",
diff --git a/openlrc/translate.py b/openlrc/translate.py
index 1ce053e..3d0c659 100644
--- a/openlrc/translate.py
+++ b/openlrc/translate.py
@@ -13,6 +13,7 @@
 
 from openlrc.agents import ChunkedTranslatorAgent, ContextReviewerAgent
 from openlrc.context import TranslationContext, TranslateInfo
+from openlrc.exceptions import ChatBotException
 from openlrc.logger import logger
 from openlrc.models import ModelConfig
 from openlrc.prompter import AtomicTranslatePrompter
@@ -107,12 +108,22 @@ def _translate_chunk(self, translator_agent: ChunkedTranslatorAgent, chunk: List
         Returns:
             Tuple[List[str], TranslationContext]: Translated texts and updated context.
         """
+
         def handle_translation(agent: ChunkedTranslatorAgent) -> Tuple[List[str], TranslationContext]:
-            trans, updated_context = agent.translate_chunk(chunk_id, chunk, context)
+            trans, updated_context = None, None
+            try:
+                trans, updated_context = agent.translate_chunk(chunk_id, chunk, context)
+            except ChatBotException as e:
+                logger.error(f'Failed to translate chunk {chunk_id}.')
+
             if len(trans) != len(chunk) and agent.info.glossary:
                 logger.warning(
                     f'Agent {agent}: Removing glossary for chunk {chunk_id} due to inconsistent translation.')
-                trans, updated_context = agent.translate_chunk(chunk_id, chunk, context, use_glossary=False)
+                try:
+                    trans, updated_context = agent.translate_chunk(chunk_id, chunk, context, use_glossary=False)
+                except ChatBotException as e:
+                    logger.error(f'Failed to translate chunk {chunk_id}.')
+
             return trans, updated_context
 
         if self.use_retry_cnt == 0 or not retry_agent:
@@ -128,6 +139,9 @@ def handle_translation(agent: ChunkedTranslatorAgent) -> Tuple[List[str], Transl
             translated, context = handle_translation(retry_agent)
             self.use_retry_cnt -= 1
 
+        if not translated:
+            raise ChatBotException(f'Failed to translate chunk {chunk_id}.')
+
         return translated, context
 
     def translate(self, texts: Union[str, List[str]], src_lang: str, target_lang: str,
diff --git a/tests/test_validators.py b/tests/test_validators.py
index 3f0791e..e556214 100644
--- a/tests/test_validators.py
+++ b/tests/test_validators.py
@@ -60,7 +60,7 @@ def test_validate_returns_true_when_generated_content_matches_target_language(se
         self.assertTrue(result)
 
     def test_validate_returns_false_when_generated_content_not_matches_target_language(self):
-        validator = AtomicTranslateValidator(target_lang='cn-zh')
+        validator = AtomicTranslateValidator(target_lang='zh-cn')
         user_input = "Hello"
         generated_content = "你好"