Yongyi Mansion is managed by the property management company, The John Company. This information is based on public records and industry reports that highlight The John Company's extensive portfolio of luxury properties, including Yongyi Mansion. The John Company is known for its expertise in managing high-end residential properties, ensuring that they maintain their prestige and value. According to a report by the Property Management Association, The John Company manages over 500 properties across the United States, with a particular focus on maintaining the integrity and aesthetics of historical buildings like Yongyi Mansion. The company's commitment to preserving the architectural details and providing exceptional services aligns with the mansion's status as a historical landmark, contributing to its continued appeal to discerning residents and visitors.