I don't know how it is in China. . Japan, a country that strictly enforces copyright, rarely sees free books online. Although it seems that the law stipulates that the ban will be lifted 50 years later, books written 50 years ago should not be within the scope of copyright restrictions, but libraries, a public welfare place, are inherently unprofitable and rely on state tax revenue to operate, so it is impossible to have redundant manpower and the ability to upload books online. . . Besides, because it is not its own copyright, it can't be charged, and it is thankless.
I have only been to the Library of Congress once. Although the books are complete, there are many special places.
Some books can't even be checked out, they can only be copied there. . . . . .
Of course, taking pictures is even worse. . .