The "Front Shop and Back Factory" model has driven the economic development of the Pearl River Delta and transformed Hong Kong into a world-class service hub. With the rapid development of the mainland's economy, Guangdong has gradually replaced the services provided by traditional Hong Kong companies with local service industries. However, Hong Kong has also developed a high-quality service industry. Looking to the future, through the coordinated development of the modern industrial system, the integration of the Greater Bay Area will shift from vertical integration to horizontal integration, which can generate greater trade and investment. Hong Kong's economic size has its limitations, and we can only win by quality rather than quantity. Hong Kong should focus on developing high value-added trade services and cooperate with other airports in the region to maintain the competitiveness of maritime and shipping services and upgrade to a service hub for regional supply chain management. At the same time, we will seize the opportunity of national financial reform and the rapid economic development of Asia, and cooperate with professional services to become a global financial center. Even if innovation and technology starts slowly in Hong Kong, it can still catch up and eventually realize the Greater Bay Area industrial chain of "created in Hong Kong, trial production in Shenzhen, and mass production in the Pearl River Delta", creating a world-leading international innovation and technology center. In the long run, Hong Kong's role will go beyond finance, professional services, shipping and logistics, and legal arbitration to become a diversified external platform for exerting "soft power" in the country's foreign economic strategy.