1. Logo design: The logo of Saint Laurent consists of two letters Y and S, with a dot above the letter Y.. This logo first appeared on the brand's first perfume product "YSLPourHomme", marking the birth of the brand. The cross between the letters Y and S expresses the brand's spirit of innovation and breakthrough.

2. Brand symbol: The letters Y and S, the core elements of this logo, are the initials of Yves Saint Laurent, which embodies the personal symbol and honor of the brand founder and forms the cornerstone of the brand. This reflects the brand's respect for designers and unique understanding of fashion.