diff --git a/README.md b/README.md
index 8ce2a36..116a29f 100644
--- a/README.md
+++ b/README.md
@@ -70,6 +70,21 @@
 run thu-learn-downloader-windows-x86_64.exe in cmd or powershell.
 
 ## exe packing
-
-- run in project root: 
+- run in project root:
+- please install playwright directly in venv using:
+```powershell
+$env:PLAYWRIGHT_BROWSERS_PATH="0"
+playwright install chromium
+```
+(please refer to:https://playwright.dev/python/docs/library#pyinstaller)
+then:
+```powershell
 .\.venv\Scripts\pyinstaller.exe --onefile --clean --add-data "thu_learn_downloader/openssl.conf;thu_learn_downloader" .\thu_learn_downloader\main.py --runtime-hook .\thu_learn_downloader\hook.py
+```
+## exe recommended usage
+```powershell
+.\thu-learn-downloader-windows-x86_64.exe -u [USERNAME] -p [PASSWORD] -s [SEMESTER]
+```
+NOTICE THAT PASSWORD WILL NOT BE REDACTED!!!
+
+then complete 2FA in prompted browser panel.
\ No newline at end of file
diff --git a/thu_learn_downloader/client/learn.py b/thu_learn_downloader/client/learn.py
index 8cead89..0f03b13 100644
--- a/thu_learn_downloader/client/learn.py
+++ b/thu_learn_downloader/client/learn.py
@@ -1,15 +1,13 @@
 import functools
 import re
-from playwright.sync_api import sync_playwright
-from requests.cookies import RequestsCookieJar
 from collections.abc import Sequence
-from urllib.parse import ParseResult
 
 from bs4 import BeautifulSoup, Tag
+from playwright.sync_api import sync_playwright
 from requests import Response
+from requests.cookies import RequestsCookieJar
 
 from thu_learn_downloader.common.typing import cast
-
 from . import url
 from .client import Client, Language
 from .semester import Semester