What does Van Gogh's Sunflower mean? What does this group of works represent?

Van Gogh created sunflowers at the maturity of his painting. The exaggerated figure and passionate colors of sunflower on the screen make people dizzy. His heart is full of passion and he wants to draw flowers facing the sun. Stamens are painted red, like a flaming fireball; Yellow petals are like dazzling light from the sun. The painter's bold and provocative brushwork seems to give every sunflower a strong vitality. Here, you use "lifelike" to describe these sunflowers, which is already weak and shallow, because the flaming sunflowers seem to be burning life after life, and the painter gives them an impulse and tension to burn life vigorously. Some people say that this is Van Gogh's Sunflower, because it is a portrayal of his passionate feelings and the exposure of his spiritual strength, just like there would be no Dream of Red Mansions without Cao Xueqin, and there would be no Van Gogh's sunflower without Van Gogh. Genius artists can often set an epoch-making artistic peak in a certain field, which later generations can only worship and never reach, as Van Gogh did. As a pioneer of modern expressionism and a typical artist with extreme personality, Van Gogh emphasized his feelings about things rather than the visual image he saw. He boldly pursues the expressive force of lines and colors, regardless of the consequences. He once said: "In order to express myself more effectively, I use colors more freely." In fact, in this work, not only the colors and lines, but also the perspective and scale are completely changed to meet the needs of the painter to express himself at will. Van Gogh's unrestrained creative style made him take different types of figures, flowers and still life as his "practice" objects and meticulously sketch directly. From this perspective, he is describing the impression, but the external technique is no longer important, and he pays more attention to the connotation and charm of the painting. It can be clearly seen that after getting indispensable artistic enlightenment from Impressionism, he went far beyond Impressionism. As he said, "I can't find a better explanation for the word' art' than the following sentence: Art is nature, reality and truth, but artists can use it to express profound connotations, concepts and characteristics. Artists have their own expressions of these connotations, concepts and characteristics, which are unique, clear and definite. As a painter who created with his life, Van Gogh skillfully combined his subjective creative consciousness and inner emotional consciousness with the elements of oriental painting, and set up an epoch-making monument in the most tragic life situation and passionate pursuit of art.