diff --git a/api/base.py b/api/base.py
index 59aff43..234123a 100644
--- a/api/base.py
+++ b/api/base.py
@@ -111,7 +111,6 @@ def get_job_list(self, _clazzid, _courseid, _cpi, _knowledgeid):
         return _job_list, _job_info
 
     def get_enc(self, clazzId, jobid, objectId, playingTime, duration, userid):
-        # https://github.com/ZhyMC/chaoxing-xuexitong-autoflush/blob/445c8d8a8cc63472dd90cdf2a6ab28542c56d93b/logger.js
         return md5(
             f"[{clazzId}][{userid}][{jobid}][{objectId}][{playingTime * 1000}][d_yHJ!$pdA~5][{duration * 1000}][0_{duration}]"
             .encode()).hexdigest()
@@ -143,10 +142,10 @@ def study_video(self, _course, _job, _job_info, _speed: float = 1):
         _session.headers.update()
         _info_url = f"https://mooc1.chaoxing.com/ananas/status/{_job['objectid']}?k={self.get_fid()}&flag=normal"
         _video_info = _session.get(_info_url).json()
-        _dtoken = _video_info["dtoken"]  # 7d8349c683a65af92b68ed42b9eebfc1
+        _dtoken = _video_info["dtoken"]
         _duration = _video_info["duration"]
-        _crc = _video_info["crc"]  # 993fd31ba058895723016fa4fe9a6486
-        _key = _video_info["key"]  # 71980072a32dd57d151f7c3f6b3b122c
+        _crc = _video_info["crc"]
+        _key = _video_info["key"]
         _isPassed = False
         _isFinished = False
         _playingTime = 0
diff --git a/api/decode.py b/api/decode.py
index 5664203..9c7f22f 100644
--- a/api/decode.py
+++ b/api/decode.py
@@ -57,13 +57,13 @@ def decode_course_card(_text: str):
     _job_list = []
     if _cards:
         _job_info = {}
-        _job_info["ktoken"] = _cards["defaults"]["ktoken"]  # 0754c189543882e328d711960117de81
-        _job_info["mtEnc"] = _cards["defaults"]["mtEnc"]    # 5a281a5c9819ae54f0b23bf97865133e
+        _job_info["ktoken"] = _cards["defaults"]["ktoken"]
+        _job_info["mtEnc"] = _cards["defaults"]["mtEnc"]
         _job_info["reportTimeInterval"] = _cards["defaults"]["reportTimeInterval"]   # 60
-        _job_info["defenc"] = _cards["defaults"]["defenc"]  # 48a25584121db3161e429c9b0861b3da
-        _job_info["cardid"] = _cards["defaults"]["cardid"]  # 690554045
-        _job_info["cpi"] = _cards["defaults"]["cpi"]    # 82923364
-        _job_info["qnenc"] = _cards["defaults"]["qnenc"]    # a60d09ee89bc30d264e09d24b77e3ada
+        _job_info["defenc"] = _cards["defaults"]["defenc"]
+        _job_info["cardid"] = _cards["defaults"]["cardid"]
+        _job_info["cpi"] = _cards["defaults"]["cpi"]
+        _job_info["qnenc"] = _cards["defaults"]["qnenc"]
         _job_info["ktoken"] = _cards["defaults"]["ktoken"]
         _job_info["ktoken"] = _cards["defaults"]["ktoken"]
         _job_info["ktoken"] = _cards["defaults"]["ktoken"]