Supplement: The story of "Picking up the Ash Head", "Although there is a lute in the green gauze tent, I dare not play it in spring" and "Why doesn't my father-in-law play a song, and the rich water doesn't flow?" is as follows: The improper behavior between my father-in-law and my daughter-in-law is called "picking up the ash" in China. Its origin may be Su Dongpo. After Su Dongpo lost his wife in his prime, his career was not smooth and he was once decadent. He stayed at home, took no care of anything, was proud of calligraphy and poetry, stopped playing, or even went into the study for a few days. His son has no father's demeanor, idles around and often doesn't go home. However, she married a beautiful little girl and often talked with Su Dongpo in poetry. Therefore, the relationship between Weng and his daughter-in-law is closer than that between father and son. At noon one day, Su Dongpo was bored after drinking, so he went to the study and took a nap on his desk. A thin layer of dust fell on the table because it had not been cleaned for many days. Just as Su Dongpo was bored, his daughter-in-law wore a light green skirt and brought him tea with a teapot and teacups. Su Dongpo was in high spirits when he saw his wife's charming figure and youthful and beautiful dress. Touching the water with his hand, he wrote on the table: "There is a pipa in the green gauze tent. Although there are springs, I dare not play it." When his daughter-in-law saw it, although her face was feverish, it was not without ridicule. She also dipped her hand into the water and wrote, "Why not play a song, and the rich water will not flow out of the field?" I was flirting with my wife. In the charming atmosphere, Su Dongpo's son rushed to the study to visit his father. Su Dongpo was worried that his son would see the mystery on the desk, so he brushed off his robe sleeve and wiped away his handwriting. His son was puzzled by Su Dongpo's behavior and asked, "Father, what are you doing?" ? Su Dongpo replied: "I am picking up ash!" Add: gray head: an old man who can't get along well with his daughter-in-law