@chengyensheng your problem is that you do NOT follow instructions.
You have entered absurd values like 192 years in Database Settings.
You should set up you your database AS INSTRUCTED in the video
and in the manual:
Other configurations than specified in the video and manual are NOT supported
IQfeed is REAL TIME streaming data source, NOT EOD only. You need to configure it as “MIXED Intraday/EOD mode” as it is written in the manual with base interval 1-minute and then you will get BOTH intraday data and long EOD data in single database without need to keep two databases.
If you followed instructions from the beginning you would not cause problems.
If you want to use EOD-only it would work just fine if only you entered SANE values like 5000 EOD bars (19 years) instead of 192 years. If you did that you would get data from 1991 and even older.