Yu Songhan, also known by his pen name Pu Jin, was born in Nanjing, Jiangsu Province, and graduated from Johns Hopkins University. He founded Huanyu Technology Co., Ltd. and served as its CTO. After a change of ownership, he established Huixing Station Collection , dedicated to website and marketing solutions for small and medium-sized enterprises. He also founded SY Collectibles, a collection platform focused on educating the public about collectibles, showcasing rare items , and providing appraisal and purchasing services.