Tell an interesting story about picking water chestnuts in my hometown. Through the inquiry of short works, it is found that the main content of the ink painting "Tang Ling Cactus" is an interesting story about picking water chestnuts in my hometown. The essay Ink and Wash Tang Ling uses metaphors and analogies to express the author's homesickness, but this flavor is unique to his hometown. A style of writing that sets off emotions with things, and lyrical homesickness is the way. Water chestnut is characterized by tenderness, sweetness and fragrance.