diff --git a/crazy_functions/latex_utils.py b/crazy_functions/latex_utils.py
index 3e4f37c..a7eb9f2 100644
--- a/crazy_functions/latex_utils.py
+++ b/crazy_functions/latex_utils.py
@@ -8,24 +8,30 @@ pj = os.path.join
 """
 ========================================================================
 Part One
-Latex segmentation to a linklist
+Latex segmentation with a binary mask (PRESERVE=0, TRANSFORM=1)
 ========================================================================
 """
 PRESERVE = 0
 TRANSFORM = 1
 
-def split_worker(text, mask, pattern, flags=0):
+def set_forbidden_text(text, mask, pattern, flags=0):
     """
     Add a preserve text area in this paper
+    e.g. with pattern = r"\\begin\{algorithm\}(.*?)\\end\{algorithm\}"
+    you can mask out (mask = PRESERVE so that text become untouchable for GPT) 
+    everything between "\begin{equation}" and "\end{equation}"
     """
     pattern_compile = re.compile(pattern, flags)
     for res in pattern_compile.finditer(text):
         mask[res.span()[0]:res.span()[1]] = PRESERVE
     return text, mask
 
-def split_worker_careful_brace(text, mask, pattern, flags=0):
+def set_forbidden_text_careful_brace(text, mask, pattern, flags=0):
     """
-    Move area into preserve area 
+    Add a preserve text area in this paper (text become untouchable for GPT).
+    count the number of the braces so as to catch compelete text area. 
+    e.g.
+    \caption{blablablablabla\texbf{blablabla}blablabla.} 
     """
     pattern_compile = re.compile(pattern, flags)
     for res in pattern_compile.finditer(text):
@@ -40,9 +46,12 @@ def split_worker_careful_brace(text, mask, pattern, flags=0):
         mask[begin:end] = PRESERVE
     return text, mask
 
-def split_worker_reverse_careful_brace(text, mask, pattern, flags=0):
+def reverse_forbidden_text_careful_brace(text, mask, pattern, flags=0):
     """
-    Move area out of preserve area 
+    Move area out of preserve area (make text editable for GPT)
+    count the number of the braces so as to catch compelete text area. 
+    e.g.
+    \caption{blablablablabla\texbf{blablabla}blablabla.} 
     """
     pattern_compile = re.compile(pattern, flags)
     for res in pattern_compile.finditer(text):
@@ -57,7 +66,7 @@ def split_worker_reverse_careful_brace(text, mask, pattern, flags=0):
         mask[begin:end] = TRANSFORM
     return text, mask
 
-def split_worker_begin_end(text, mask, pattern, flags=0, limit_n_lines=42):
+def set_forbidden_text_begin_end(text, mask, pattern, flags=0, limit_n_lines=42):
     """
     Find all \begin{} ... \end{} text block that with less than limit_n_lines lines.
     Add it to preserve area
@@ -283,46 +292,49 @@ def split_subprocess(txt, project_folder, return_dict, opts):
     mask = np.zeros(len(txt), dtype=np.uint8) + TRANSFORM
 
     # 吸收title与作者以上的部分
-    text, mask = split_worker(text, mask, r"(.*?)\\maketitle", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"(.*?)\\maketitle", re.DOTALL)
     # 删除iffalse注释
-    text, mask = split_worker(text, mask, r"\\iffalse(.*?)\\fi", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\iffalse(.*?)\\fi", re.DOTALL)
     # 吸收在25行以内的begin-end组合
-    text, mask = split_worker_begin_end(text, mask, r"\\begin\{([a-z\*]*)\}(.*?)\\end\{\1\}", re.DOTALL, limit_n_lines=25)
+    text, mask = set_forbidden_text_begin_end(text, mask, r"\\begin\{([a-z\*]*)\}(.*?)\\end\{\1\}", re.DOTALL, limit_n_lines=42)
     # 吸收匿名公式
-    text, mask = split_worker(text, mask, r"\$\$(.*?)\$\$", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\$\$(.*?)\$\$", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\\[.*?\\\]", re.DOTALL)
     # 吸收其他杂项
-    text, mask = split_worker(text, mask, r"\\section\{(.*?)\}")
-    text, mask = split_worker(text, mask, r"\\section\*\{(.*?)\}")
-    text, mask = split_worker(text, mask, r"\\subsection\{(.*?)\}")
-    text, mask = split_worker(text, mask, r"\\subsubsection\{(.*?)\}")
-    text, mask = split_worker(text, mask, r"\\bibliography\{(.*?)\}")
-    text, mask = split_worker(text, mask, r"\\bibliographystyle\{(.*?)\}")
-    text, mask = split_worker(text, mask, r"\\begin\{lstlisting\}(.*?)\\end\{lstlisting\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{wraptable\}(.*?)\\end\{wraptable\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{algorithm\}(.*?)\\end\{algorithm\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{wrapfigure\}(.*?)\\end\{wrapfigure\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{wrapfigure\*\}(.*?)\\end\{wrapfigure\*\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{figure\}(.*?)\\end\{figure\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{figure\*\}(.*?)\\end\{figure\*\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{multline\}(.*?)\\end\{multline\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{multline\*\}(.*?)\\end\{multline\*\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{table\}(.*?)\\end\{table\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{table\*\}(.*?)\\end\{table\*\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{minipage\}(.*?)\\end\{minipage\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{minipage\*\}(.*?)\\end\{minipage\*\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{align\*\}(.*?)\\end\{align\*\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{align\}(.*?)\\end\{align\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{equation\}(.*?)\\end\{equation\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\begin\{equation\*\}(.*?)\\end\{equation\*\}", re.DOTALL)
-    text, mask = split_worker(text, mask, r"\\includepdf\[(.*?)\]\{(.*?)\}")
-    text, mask = split_worker(text, mask, r"\\item ")
-    text, mask = split_worker(text, mask, r"\\label\{(.*?)\}")
-    text, mask = split_worker(text, mask, r"\\begin\{(.*?)\}")
-    text, mask = split_worker(text, mask, r"\\vspace\{(.*?)\}")
-    text, mask = split_worker(text, mask, r"\\hspace\{(.*?)\}")
-    text, mask = split_worker(text, mask, r"\\end\{(.*?)\}")
-    text, mask = split_worker_careful_brace(text, mask, r"\\hl\{(.*?)\}", re.DOTALL)
-    text, mask = split_worker_reverse_careful_brace(text, mask, r"\\caption\{(.*?)\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\section\{(.*?)\}")
+    text, mask = set_forbidden_text(text, mask, r"\\section\*\{(.*?)\}")
+    text, mask = set_forbidden_text(text, mask, r"\\subsection\{(.*?)\}")
+    text, mask = set_forbidden_text(text, mask, r"\\subsubsection\{(.*?)\}")
+    text, mask = set_forbidden_text(text, mask, r"\\bibliography\{(.*?)\}")
+    text, mask = set_forbidden_text(text, mask, r"\\bibliographystyle\{(.*?)\}")
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{thebibliography\}.*?\\end\{thebibliography\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{lstlisting\}(.*?)\\end\{lstlisting\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{wraptable\}(.*?)\\end\{wraptable\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{algorithm\}(.*?)\\end\{algorithm\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{wrapfigure\}(.*?)\\end\{wrapfigure\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{wrapfigure\*\}(.*?)\\end\{wrapfigure\*\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{figure\}(.*?)\\end\{figure\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{figure\*\}(.*?)\\end\{figure\*\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{multline\}(.*?)\\end\{multline\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{multline\*\}(.*?)\\end\{multline\*\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{table\}(.*?)\\end\{table\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{table\*\}(.*?)\\end\{table\*\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{minipage\}(.*?)\\end\{minipage\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{minipage\*\}(.*?)\\end\{minipage\*\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{align\*\}(.*?)\\end\{align\*\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{align\}(.*?)\\end\{align\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{equation\}(.*?)\\end\{equation\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{equation\*\}(.*?)\\end\{equation\*\}", re.DOTALL)
+    text, mask = set_forbidden_text(text, mask, r"\\includepdf\[(.*?)\]\{(.*?)\}")
+    text, mask = set_forbidden_text(text, mask, r"\\item ")
+    text, mask = set_forbidden_text(text, mask, r"\\label\{(.*?)\}")
+    text, mask = set_forbidden_text(text, mask, r"\\begin\{(.*?)\}")
+    text, mask = set_forbidden_text(text, mask, r"\\vspace\{(.*?)\}")
+    text, mask = set_forbidden_text(text, mask, r"\\hspace\{(.*?)\}")
+    text, mask = set_forbidden_text(text, mask, r"\\end\{(.*?)\}")
+    text, mask = set_forbidden_text_careful_brace(text, mask, r"\\hl\{(.*?)\}", re.DOTALL)
+    # reverse 操作必须放在最后
+    text, mask = reverse_forbidden_text_careful_brace(text, mask, r"\\caption\{(.*?)\}", re.DOTALL)
     root = convert_to_linklist(text, mask)
 
     # 修复括号
@@ -448,7 +460,9 @@ class LatexPaperSplit():
         if mode == 'translate_zh':
             pattern = re.compile(r'\\begin\{abstract\}.*\n')
             match = pattern.search(result_string)
-            assert match is not None, "Cannot find paper abstract section!"
+            if not match:
+                pattern = re.compile(r'\\abstract\{')
+                match = pattern.search(result_string)
             position = match.end()
             result_string = result_string[:position] + self.msg + msg + self.msg_declare + result_string[position:]
         return result_string