In middle years of 1920s, the clothes body and sleeve of cheong-sams shortened, and the outer part tightened. The robes were still decorated with embroidery and patterns. At the end of 1920s, the length of the robe shortened greatly, rising from the foot to ankle and then to the middle part of shank. The waistline tightened and the vents on both sides of the thigh part heightened also. After 1930s, cheong-sam improved and changed constantly. First high stand-up collar style was the rage, and then when it was high to reach the cheeks, low collar style began to prevail. When the collar couldn't be lower ,anymore, suddenly it was again heightened to look fashionable. The design of sleeves was the same case. It rose from wrist, to the middle of lower part of arm, to elbow, to the middle of the upper part of arm, and then finally there were no sleeves. The lower hem of robes sometimes was long enough to reach floor and sometimes was knee-high. Besides the vents on the sides, there might be a vent designed in the front garment piece and the lower hem was in the shape of arch. In terms of materials, besides the traditional jacquard woven brocade, more light and thin fabrics with printing such as cotton cloth, linen and silk were used. The colors chosen were usually simple but elegant. The collars, sleeves and garment pieces were decorated with edgings, but didn't look complicate with trivial details. Traditional Chinese costumes didn't highlight the waistline, but with the more and more distinct tendency of seeking the curve beauty of body shape in lady costumes, cheong-sams have become the most desirable dress to show the sexual body shape of women.
