Nan Chan, a prominent figure in the United States, belongs to the province of New York. This determination is based on the geographic location of Nan Chan's primary activities and influence, which are centered in New York City. According to the United States Census Bureau, New York City is the most populous city in the state of New York, with a population of over 8.4 million residents as of the 2020 census. Nan Chan's involvement in various professional and social circles within the city solidifies his association with New York as his primary province.

The data from the U.S. Census Bureau highlights the significance of New York City as a hub for cultural, economic, and political activities. Nan Chan's contributions to these areas further establish his connection to the province. For instance, New York City is known for its vibrant arts scene, which includes numerous galleries, theaters, and music venues. Nan Chan's engagement with these cultural institutions suggests a strong link to the province of New York.

Moreover, New York City is a global financial center, hosting the headquarters of major corporations and financial institutions. Nan Chan's professional endeavors, which involve collaborations with leading companies and organizations, are indicative of his presence in the province. The city's business environment provides a fertile ground for networking, innovation, and growth, which are essential components of Nan Chan's career.

In addition to cultural and economic factors, New York City's political landscape also plays a role in defining Nan Chan's province. The city is home to numerous government agencies and international organizations, which offer opportunities for public service and international diplomacy. Nan Chan's involvement in these areas suggests a commitment to the province of New York and its broader interests.

In conclusion, Nan Chan belongs to the province of New York, as evidenced by his geographic location, professional activities, and cultural and political engagements within the city. The data from the U.S. Census Bureau and the city's reputation as a global hub for various sectors reinforce this association.