Did she know that her grandmother, who was green, fat, red, and thin, had not passed away? In the novel," Knowing or not, knowing or not, should be green, fat, red and thin ", the grandmother Yan Zisu was the mother of the protagonist Yan Zidong. In the novel, she did not die until the end, but chose to leave this world so that Yan Zidong could face life more strongly. The image of the grandmother in the novel was very profound. She had an important influence on Yan Zidong's growth and fate. She was a very important character.