diff --git a/backend/app/services/download_service.py b/backend/app/services/download_service.py
index 46029a11..26dd1018 100644
--- a/backend/app/services/download_service.py
+++ b/backend/app/services/download_service.py
@@ -10,6 +10,32 @@ from datetime import datetime
 from backend.app.services.pdf_generator import PDFGenerator
 
 
+# 分析師中英文名稱對照表
+ANALYST_NAME_MAPPING = {
+    # 分析師組
+    "市場分析師": "Market_Analyst",
+    "基本面分析師": "Fundamentals_Analyst",
+    "社群媒體分析師": "Social_Media_Analyst",
+    "新聞分析師": "News_Analyst",
+    
+    # 研究員組
+    "看漲研究員": "Bull_Researcher",
+    "看跌研究員": "Bear_Researcher",
+    
+    # 風險辯論者組
+    "激進分析師": "Aggressive_Debator",
+    "保守分析師": "Conservative_Debator",
+    "中立分析師": "Neutral_Debator",
+    
+    # 經理組
+    "研究經理": "Research_Manager",
+    "風險經理": "Risk_Manager",
+    
+    # 交易員
+    "交易員": "Trader",
+}
+
+
 class DownloadService:
     """Service for handling analyst report downloads"""
     
@@ -17,6 +43,19 @@ class DownloadService:
         """Initialize download service"""
         self.pdf_generator = PDFGenerator()
     
+    def _get_english_name(self, analyst_name: str) -> str:
+        """
+        獲取分析師的英文名稱
+        
+        Args:
+            analyst_name: 中文分析師名稱
+            
+        Returns:
+            英文分析師名稱
+        """
+        # 使用對照表，如果找不到則使用原名稱並替換空格
+        return ANALYST_NAME_MAPPING.get(analyst_name, analyst_name.replace(" ", "_"))
+    
     def create_single_pdf(
         self,
         analyst_name: str,
@@ -44,8 +83,9 @@ class DownloadService:
             report_content=report_content,
         )
         
-        # Generate filename: 股票代號_分析師_日期.pdf
-        filename = f"{ticker}_{analyst_name}_{analysis_date}.pdf"
+        # Generate filename with English name: TICKER_English_Name_DATE.pdf
+        english_name = self._get_english_name(analyst_name)
+        filename = f"{ticker}_{english_name}_{analysis_date}.pdf"
         
         return pdf_bytes, filename
     
@@ -86,15 +126,16 @@ class DownloadService:
                     report_content=report_content,
                 )
                 
-                # Add to ZIP with proper filename
-                pdf_filename = f"{ticker}_{analyst_name}_{analysis_date}.pdf"
+                # Add to ZIP with English filename
+                english_name = self._get_english_name(analyst_name)
+                pdf_filename = f"{ticker}_{english_name}_{analysis_date}.pdf"
                 zip_file.writestr(pdf_filename, pdf_bytes)
         
         # Get ZIP content
         zip_bytes = zip_buffer.getvalue()
         zip_buffer.close()
         
-        # Generate ZIP filename: 股票代號_日期.zip
+        # Generate ZIP filename: TICKER_DATE.zip
         zip_filename = f"{ticker}_{analysis_date}.zip"
         
         return zip_bytes, zip_filename
diff --git a/backend/app/services/pdf_generator.py b/backend/app/services/pdf_generator.py
index 7a90c024..c0c06dc9 100644
--- a/backend/app/services/pdf_generator.py
+++ b/backend/app/services/pdf_generator.py
@@ -109,14 +109,14 @@ class PDFGenerator:
         """
         buffer = io.BytesIO()
         
-        # Create PDF document
+        # Create PDF document with reduced margins for more content space
         doc = SimpleDocTemplate(
             buffer,
             pagesize=A4,
-            rightMargin=2*cm,
-            leftMargin=2*cm,
-            topMargin=2*cm,
-            bottomMargin=2*cm,
+            rightMargin=1.5*cm,
+            leftMargin=1.5*cm,
+            topMargin=1.5*cm,
+            bottomMargin=1.5*cm,
         )
         
         # Container for the 'Flowable' objects
@@ -163,12 +163,14 @@ class PDFGenerator:
             'CustomBody',
             parent=styles['Normal'],
             fontName=self.primary_font,
-            fontSize=10,
-            leading=16,  # Increased from 14 for better readability
+            fontSize=9,
+            leading=14,
             textColor=HexColor('#333333'),
-            spaceAfter=10,
+            spaceAfter=8,
             wordWrap='CJK',
             splitLongWords=True,
+            allowOrphans=0,
+            allowWidows=0,
         )
         
         # Add title
@@ -221,7 +223,8 @@ class PDFGenerator:
     
     def _clean_markdown(self, text: str) -> str:
         """
-        Clean markdown formatting for PDF
+        Clean markdown formatting for PDF - IMPROVED VERSION
+        Fixes spurious character issues and improves cleaning logic
         
         Args:
             text: Markdown text
@@ -229,36 +232,53 @@ class PDFGenerator:
         Returns:
             Cleaned text
         """
-        # Remove markdown links but keep text
+        # 1. Remove markdown links but keep text
         text = re.sub(r'\[([^\]]+)\]\([^\)]+\)', r'\1', text)
         
-        # Remove bold/italic markers carefully to avoid orphan characters
-        text = re.sub(r'\*\*([^\*]+)\*\*', r'\1', text)
-        text = re.sub(r'(?<!\*)\*([^\*]+)\*(?!\*)', r'\1', text)  # Avoid double asterisks
-        text = re.sub(r'__([^_]+)__', r'\1', text)
-        text = re.sub(r'(?<!_)_([^_]+)_(?!_)', r'\1', text)  # Avoid double underscores
+        # 2. Remove bold markers (improved version)
+        text = re.sub(r'\*\*(.+?)\*\*', r'\1', text)
         
-        # Remove code blocks
-        text = re.sub(r'```[^`]*```', ' ', text, flags=re.DOTALL)  # Replace with space not empty
-        text = re.sub(r'`([^`]+)`', r'\1', text)
+        # 3. Remove italic markers (more precise to avoid side effects)
+        text = re.sub(r'(?<![\*_])\*([^\*\n]+?)\*(?![\*_])', r'\1', text)
+        text = re.sub(r'(?<![\*_])_([^_\n]+?)_(?![\*_])', r'\1', text)
         
-        # Clean up bullet points
+        # 4. Remove underscore bold
+        text = re.sub(r'__(.+?)__', r'\1', text)
+        
+        # 5. Remove code blocks
+        text = re.sub(r'```[^`]*?```', '', text, flags=re.DOTALL)
+        text = re.sub(r'`([^`]+?)`', r'\1', text)
+        
+        # 6. Clean up bullet points
         text = re.sub(r'^\s*[\*\-\+]\s+', '• ', text, flags=re.MULTILINE)
         
-        # Remove horizontal rules
-        text = re.sub(r'^[\-\*\_]{3,}\s*$', '', text, flags=re.MULTILINE)
+        # 7. Remove horizontal rules
+        text = re.sub(r'^[\-\*_]{3,}\s*$', '', text, flags=re.MULTILINE)
         
-        # Remove multiple consecutive spaces
+        # 8. Clean table separators
+        text = re.sub(r'^\s*\|?\s*:?-+:?\s*\|?\s*$', '', text, flags=re.MULTILINE)
+        
+        # 9. Remove table | symbols (keep content)
+        text = re.sub(r'^\s*\|', '', text, flags=re.MULTILINE)
+        text = re.sub(r'\|\s*$', '', text, flags=re.MULTILINE)
+        text = re.sub(r'\|', ' | ', text)
+        
+        # 10. Clean excess spaces
         text = re.sub(r' {2,}', ' ', text)
         
-        # Remove orphaned single characters that might be markdown artifacts
-        text = re.sub(r'(?<=[^\w])([*_`~#])(?=[^\w])', '', text)
+        # 11. Clean excess blank lines
+        text = re.sub(r'\n{3,}', '\n\n', text)
         
-        return text
+        # 12. Remove isolated markdown symbols (more cautious to avoid spurious chars)
+        text = re.sub(r'(?<=\s)[\*_`~#]+(?=\s)', '', text)
+        text = re.sub(r'^[\*_`~#]+(?=\s)', '', text, flags=re.MULTILINE)
+        text = re.sub(r'(?<=\s)[\*_`~#]+$', '', text, flags=re.MULTILINE)
+        
+        return text.strip()
     
     def _escape_html(self, text: str) -> str:
         """
-        Escape HTML special characters for PDF
+        Escape HTML special characters for PDF - IMPROVED VERSION
         
         Args:
             text: Text to escape
@@ -266,7 +286,16 @@ class PDFGenerator:
         Returns:
             Escaped text
         """
-        text = text.replace('&', '&amp;')
-        text = text.replace('<', '&lt;')
-        text = text.replace('>', '&gt;')
+        # Escape in order to avoid double-escaping
+        replacements = [
+            ('&', '&amp;'),
+            ('<', '&lt;'),
+            ('>', '&gt;'),
+            ('"', '&quot;'),
+            ("'", '&apos;'),
+        ]
+        
+        for old, new in replacements:
+            text = text.replace(old, new)
+        
         return text