What changes did Yu Hua, a modern writer in China, have in his writing style in the 1990s?

Writer Yu Hua published novels Alive and Xu Sanguan Selling Blood in 1990s, which completely changed his writing style in 1980s. These two works profoundly describe the daily life of the middle and lower classes in China urban society for half a century. Yu Hua used this theme to discuss the tolerance and attitude of the people in China, especially the story of Xu Sanguan, and wrote the life attitude that ordinary people can still maintain humor, optimism and tenacious survival under the pressure of suffering. Yu Hua put these humor and optimism in the background of folk culture with a long history, and successfully excavated the spiritual source of China folk struggle against suffering, which has long been covered by mainstream culture. These works expose the seriousness of real life, drive away the ideology of personal subjective consciousness, bring the distance between novels and real life to the closest point, and vividly show the fearless nature of people struggling at the bottom of life in the face of suffering.