In a word, in this age of developed information, it is not difficult to look up data and information, but it is a bit difficult. If you still can't find it, you can go directly to the relevant departments for consultation. Of course, this will delay some time, so it is best to go on weekdays and during working hours, otherwise you will have to wait during the break.
To do a good job in archival work, many college graduates should first take it seriously.
Archival work has a great influence on many things in our future.