Everyone learns from Shanghai, but learning to learn is not the same. By the time they learn three portraits, Shanghai has changed. This is a popular ballad in 1930s and 1940s, but it vividly reflects how prominent and leading Shanghai was in the clothing industry at that time.

The 1930s and 1940s were the most glorious period of modern women's wear in China, and the 1930s was the brilliant peak of this period. In other words, at this time, the cheongsam has established an irreplaceable position on the stage of women's wear and has become a typical representative of women's wear in China. Cheongsam, known as China costume, Shanghai style cheongsam and western style, quickly spread from Shanghai to all parts of the country. In fact, it was the cheongsam in the 1930s that became famous all over the world. Cheongsam is more suitable for China women's slim figure characteristics, especially popular with Shanghai women. In addition, foreign fabrics continued to enter China during this period, and there were clothing columns in major newspapers and magazines, as well as the popular brand "Beautiful Fashion" monthly, which promoted the emergence and popularity of fashion. Major department stores often hold fashion shows and exhibitions. Shanghai, in particular, has become a national fashion center, because the latest European and American styles are popular in Shanghai every three or four months, and all parts of the country follow Shanghai as an example and compete to imitate it. Opportunities for trade exchanges at home and abroad are becoming more and more frequent, and textiles such as cloth, feather yarn, woolen cloth and lace imported from Europe are flooding in, which makes people choose a wide range and changes their dress concept. As an important representative of Shanghai style culture, Shanghai style cheongsam became the mainstream of cheongsam in 1930s. In 1930s, the aristocratic ladies of Shanghai upper class followed the fashion and lived a luxurious life, which was unprecedented in the history of China. They advocate a westernized life: swimming, riding, dancing and playing golf, all of which need more beautiful and harmonious clothes. In addition, in the 1930s, waist-closing was popular in Europe and America, reflecting the beauty of women, which doomed the cheongsam to become more slender, tight-fitting and high-forked, thus conforming to the ideal image of exquisiteness, exquisiteness, openness and liveliness in the 1930s.