diff --git a/AUTHORS.md b/AUTHORS.md
index 41423fa6..df16f050 100644
--- a/AUTHORS.md
+++ b/AUTHORS.md
@@ -16,5 +16,7 @@
 
 [Meikai Bao](https://github.com/BAOOOOOM)
 
+[Yuting Ning](https://github.com/nnnyt)
+
 
 The stared contributors are the corresponding authors. 
diff --git a/EduNLP/Tokenizer/tokenizer.py b/EduNLP/Tokenizer/tokenizer.py
index bb7b47e5..08b09e26 100644
--- a/EduNLP/Tokenizer/tokenizer.py
+++ b/EduNLP/Tokenizer/tokenizer.py
@@ -65,6 +65,12 @@ class TextTokenizer(Tokenizer):
     >>> tokens = tokenizer(items)
     >>> next(tokens)[:10]
     ['公式', '[FORMULA]', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[FORMULA]']
+    >>> items = ["$\\SIFTag{stem_begin}$若复数$z=1+2 i+i^{3}$，则$|z|=$$\\SIFTag{stem_end}$\
+    ... $\\SIFTag{options_begin}$$\\SIFTag{list_0}$0$\\SIFTag{list_1}$1$\\SIFTag{list_2}$$\\sqrt{2}$\
+    ... $\\SIFTag{list_3}$2$\\SIFTag{options_end}$"]
+    >>> tokens = tokenizer(items)
+    >>> next(tokens)[:10]
+    ['[TAG]', '复数', 'z', '=', '1', '+', '2', 'i', '+', 'i']
     """
 
     def __init__(self, *args, **kwargs):
diff --git a/tests/test_sif/test_tokenization.py b/tests/test_sif/test_tokenization.py
index b904a71b..43dfde02 100644
--- a/tests/test_sif/test_tokenization.py
+++ b/tests/test_sif/test_tokenization.py
@@ -3,7 +3,7 @@
 
 import pytest
 from EduNLP.SIF.constants import Symbol
-from EduNLP.SIF.segment.segment import SegmentList
+from EduNLP.SIF.segment.segment import SegmentList, LatexFormulaSegment
 from EduNLP.SIF.tokenization import text
 from EduNLP.SIF.tokenization import formula
 from EduNLP.SIF.tokenization.tokenization import TokenList
@@ -32,3 +32,5 @@ def test_tokenization():
 
     with pytest.raises(TypeError):
         tl.append("[Unknown]")
+
+    tl.append(LatexFormulaSegment('x+y'), False)