What is traditional oil painting and how to define it?

Probably similar to the oil paintings before the 20th century in terms of materials, painting methods and styles.

First of all, only use oil painting materials (not mixed with other materials).

Secondly, the picture is complete and basically conforms to the focus perspective.

In fact, the word "tradition" refers to the achievements handed down from the past and history, while the new look and achievements of modern times have yet to be tested by time. In a few years, modern things will also be called "tradition".