What is the significance of Oracle Bone Inscriptions's discovery to the study of writing and calligraphy?

China's philology and calligraphy are the two closest subjects, and there is no calligraphy without words. Oracle Bone Inscriptions's discovery is of great significance not only to philology, but also to calligraphy. This is manifested in two aspects. First of all, Oracle Bone Inscriptions itself has a very high aesthetic value, which is not inferior to the real Cao Li seal. Skillful knife work, stiff lines, changeable knots and natural rules outline a mysterious artistic realm. As Guo Moruo said in the preface of Yin Qi Nazi Compilation, "Oracle Bone Inscriptions is related to Oracle bones, and his exquisite deeds and beautiful words have fascinated our descendants for thousands of years." Therefore, since Oracle Bone Inscriptions was discovered, interpreted and studied, a number of Oracle Bone Inscriptions calligraphers have emerged. Because there are not many interpretable words, they can't fully express their thoughts, and most of them are collections of words. Therefore, with the increase of Oracle Bone Inscriptions, calligraphy creation will have greater development; Secondly, the artistic realm presented by oracle calligraphy can inspire us with the unique connotation and ultimate significance of calligraphy aesthetics. As we know, calligraphy, as an art in the modern sense, has many artistic elements, such as rich and changeable structure, ever-changing lines, fast and slow rhythm, dry and thick brushwork and delicate brushwork, which makes calligraphy look like an avalanche or rainbow, or a small bridge like a chrysanthemum. However, when we look at Oracle Bone Inscriptions from the perspective of modern art, we will find that the so-called "elements" of modern art seem to be lacking. There are no ups and downs in lines, so it is difficult to see the change of rhythm and structure, not to mention the shade and delicate brushwork of pen and ink, but these do not affect its artistic appeal at all, and sometimes make us feel shocked, forcing us to explore the aesthetic essence of calligraphy more deeply and think about its true meaning.