Z hang Changhong is the chairman of DZH (formerly known as Shanghai Great Wisdom), a major Chinese supplier of financial data and analytics software. He founded the company to provide Chinese investors with professional market information, positioning it as a domestic rival to international giants like Bloomberg and Reuters. DZH's platforms offer real-time trading data, news, and analysis, serving a vast user base of individual and institutional traders.

Zhang led DZH to a successful initial public offering on the Shanghai Stock Exchange in 2011, raising capital to enhance its technological capabilities. Despite facing fierce competition and regulatory scrutiny in the dynamic Chinese fintech sector, Zhang has maintained DZH's presence as a key player. His background in software engineering and finance allowed him to build a tool that became indispensable for navigating China's volatile stock markets.