diff --git a/pyproject.toml b/pyproject.toml
index be62d59..ea5c2c9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,11 @@ authors = [{ name = "283375", email = "log_283375@163.com" }]
 description = "Manage your local Arcaea score database."
 readme = "README.md"
 requires-python = ">=3.8"
-dependencies = ["SQLAlchemy==2.0.20", "SQLAlchemy-Utils==0.41.1"]
+dependencies = [
+  "beautifulsoup4==4.12.2",
+  "SQLAlchemy==2.0.20",
+  "SQLAlchemy-Utils==0.41.1",
+]
 classifiers = [
   "Development Status :: 3 - Alpha",
   "Programming Language :: Python :: 3",
diff --git a/requirements.txt b/requirements.txt
index eaef1dc..53d0b8c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
+beautifulsoup4==4.12.2
 SQLAlchemy==2.0.20
 SQLAlchemy-Utils==0.41.1
diff --git a/src/arcaea_offline/external/wiki_arcaea_cn/__init__.py b/src/arcaea_offline/external/wiki_arcaea_cn/__init__.py
new file mode 100644
index 0000000..d59b800
--- /dev/null
+++ b/src/arcaea_offline/external/wiki_arcaea_cn/__init__.py
@@ -0,0 +1 @@
+from .constants import WikiArcaeaCnConstantParser
diff --git a/src/arcaea_offline/external/wiki_arcaea_cn/constants.py b/src/arcaea_offline/external/wiki_arcaea_cn/constants.py
new file mode 100644
index 0000000..b5a302e
--- /dev/null
+++ b/src/arcaea_offline/external/wiki_arcaea_cn/constants.py
@@ -0,0 +1,52 @@
+from decimal import Decimal
+from typing import Dict, List
+
+from bs4 import BeautifulSoup
+from bs4.element import Tag
+
+
+class WikiArcaeaCnConstantParser:
+    HEADERS = ["曲目", "PST", "PRS", "FTR", "BYD"]
+
+    def __init__(self, filepath):
+        self.filepath = filepath
+
+    def parse(self) -> Dict[str, List[int]]:
+        with open(self.filepath, "r", encoding="utf-8") as html_f:
+            html = BeautifulSoup(html_f.read(), "html.parser")
+
+        result = {}
+
+        for table in html.find_all("table"):
+            # check if the table is constant table
+            if not isinstance(table, Tag):
+                continue
+
+            tbody = table.find("tbody")
+            if not isinstance(tbody, Tag):
+                continue
+
+            first_tr = tbody.find("tr")
+            if not isinstance(first_tr, Tag):
+                continue
+
+            header_match = all(
+                expected_header in th.string
+                for expected_header, th in zip(self.HEADERS, first_tr.find_all("th"))
+            )
+            if not header_match:
+                continue
+
+            rows = list(tbody.find_all("tr"))[1:]
+            for row in rows:
+                title = row.td.a.string
+                constants = []
+                for td in row.find_all("td")[1:5]:
+                    constant_string = td.string.replace("\n", "")
+                    if "-" in constant_string or not constant_string:
+                        constants.append(None)
+                    else:
+                        constants.append(int(Decimal(constant_string) * 10))
+                result[title] = constants
+
+        return result