The arrival of Yuan Gujie, the new deputy director of Beijing’s liaison office in Hong Kong, has sparked widespread speculation. Her legal background and experience in Guangdong province suggest that her posting carries a clear agenda: to promote deeper integration between Hong Kong and other Greater Bay Area cities. One thing is clear: if the Northern Metropolis is to accelerate, Hong Kong’s existing legal framework and development model may prove inadequate. A fundamental overhaul is urgently...