Alex Teo is the third-generation owner of Ban Kah Hiang Trading.Erin LiamAlex Teo, 36, left his corporate job to take over his family's joss paper business.The journey has not been easy in modern Singapore, where religious affiliations are declining.Teo's career goal is to reinvent the traditional business for the younger generation.The latest smartphone, a three-story villa, and a private jet.