Copyright ownership of old textbooks

Hehe, hello, landlord. I know a little. I hope I can help you.

Copyright has a time limit. If it is an individual's copyright term, it is exclusive to the person for life until 50 years after his death, and for the copyright of a unit or group, it is 50 years after the publication of the article or work.

As for teaching materials, there are generally groups and publishing houses corresponding to the national plan. If you want to use it, you should contact the editor-in-chief or publishing house, but I don't think China is a big problem ~ ~ After all, you have studied for more than 30 years. Textbooks are compiled by the national unified organization, and some of them are directly copied from abroad, so I don't think these things are necessarily written by myself. If you want to get copyright, there are the following ways in law (I copied the following)

There are two ways to obtain copyright: automatic acquisition and registration acquisition. In China, according to the copyright law, works automatically enjoy copyright after completion. The so-called completion is relative, as long as the object of creation has met the statutory conditions for the composition of the work, it can be protected by copyright law as a work. Theoretically, according to different properties, copyright can be divided into copyright and neighboring rights. Simply put, copyright is aimed at people who create related spiritual products, while the concept of neighboring rights is aimed at participants in related industries who perform or help spread the carrier of works, such as performers, producers of audio-visual products, radio and television stations, publishing houses and so on.

You belong to the latter.