Small waist originally refers to Bai Juyi's girl's small waist (Bai Juyi refers to her girl's small waist like a willow). The back refers to a very small and thin waist.

Tang Mengbang's Poem on Technology and Things: "Bai Shangshu (Juyi) Su Fanren, good at singing, small but good at dancing. She tastes like a poem: cherry Su Fan mouth, willow small waist ". Maggie Su Fan's mouth is small and bright like a cherry; Xiaoman's waist is weak and slender as a willow. Modern people learn from Bai Juyi the cherry mouth, small waist or willow waist that girls say.

In fact, Bai Juyi was an assistant minister of punishments and an official. According to the regulations, he can only raise three girls, but his family, except Xiao Manhe, is responsible for the performance and singing of hundreds of people. He also wrote a poem saying: "The water chestnut embraces Shengchun, and the aunt wipes the pipa. Red gauze believes in hand dancing, and purple gauze sings at will. " These are his family.

Willow graceful, graceful feeling through the word "small waist" on the paper. Liu Xiaoyao tells the graceful curves of women. No wonder a small waist is synonymous with a thin waist.

Extended data:

Water snake waist is a sign of incorrect posture. When people stand, the "S" shape distortion of the spine from cervical vertebra, thoracic vertebra and lumbar vertebra to sacrum and coccyx is stronger than that of ordinary people. People with water snake waist tend to have obvious lumbar lordosis, forward neck and hunchback tendency. Some waist is thin and convex, hips are plump or hips are huge and backward, and sometimes they sway when walking.

Baidu encyclopedia-water snake waist

Baidu Encyclopedia-Xiaomanyao