Finally, we found a better free SQLite management tool ..

SQLite administrator was used in the past, and the keyboard support was too bad. I also found that it has a bug that will display columns not the primary key as the primary key. the author has not updated the source code for a long time, and cannot find the source code if he wants to modify it. It is developed using Delphi, and it is troublesome even if he finds it.
Today, I finally found SQLite expert on the Internet. Its free version only has three functions, namely data import and export, constraint management, and trigger management, which I just used less. it will be used later.