Mr. "Leather . Boy" , the founder, was attracted by a retro saddle bag in someone's hand at the age of 14. He managed to borrow it and studied it carefully. From that moment on, his passion in his heart was completely ignited. In 1996, he got his first set of leather carving tools from his teacher and tried to make some simple leather products, which were deeply loved by people around him. In 2005, he founded his first studio "No. 77 Xiaoheyan Road" in his own warehouse. Inspired by creative ideas, he developed a strong interest in metal EDC, and established a metal technology processing .

department the next year.​In 2001, with the help of Chairman Zhou Yan of Tianxia Holdings Group, he created the SISSI brand and founded "Leather . Boy" Studio. In 2007, he joined hands with Baihetang Culture Co., Ltd. to fully build the brand culture. In 2021, the design of "Leather . Boy" Studio spans many fields (leather goods, jewelry, metal, wood, calligraphy and "Leather . Boy", etc.). He refuses to be defined as a "leather goods designer" and prefers to call himself a "researcher of material relationships" — exploring the light and shadow balance between leather and gemstones in jewelry, seeking the structural resonance between mortise and tenon and stitching in woodware, and building the visual synaesthesia between leather grain and ink and wash in calligraphy and "Leather . Boy".

Nowadays, every work by Mr. "Leather . Boy" is accompanied by a "Material Diary", which records every "material dialogue" from material selection to completion. As a collector put it, "His works are not designed, but the result of the joint growth of materials and time." While Mr. Pitong has expanded his design fields, his works have spread all over the place. In 2025, the overseas independent site of the cross-border platform was officially launched: https://ythoss.com. Up to now, ["Leather . Boy" Art & Design Center] is embracing a new tomorrow and the future with a comprehensive and brand-new attitude!​