“Call a Doctor” is an internet-based platform for multi-site physician practice, developed by Shenzhen Sanyi Information Technology Co., Ltd. Operating on a model similar to ride-hailing services, it facilitates the matching of demand information between hospitals and physicians, with user coverage across China. By promoting efficient and precise collaboration between physicians and hospitals, the platform aims to foster patient trust in primary care institutions, enabling them to seek medical attention locally. This helps avoid high-risk referrals, difficulties in registering and lack of bed availability at large tertiary hospitals, and the high costs associated with seeking medical care in other regions.