Mystery $33 billion Chinese medical fortune collapses in days

Regencell Bioscience's stock surge baffled many. CEO Yat-Gai Au remained elusive amidst the volatility. The company's traditional Chinese medicine business faces scrutiny. Regulators are examining unusual stock movements. Concerns arise about potential pump-and-dump schemes. The company's social media strategy involved Taylor Swift concert tickets. Visitors seeking treatment information were turned away.