Editor's note: The rapid advancement of artificial intelligence is reshaping nearly every facet of human existence. This series will take an in-depth look at this transformative force, examining how AI is redefining the way we live, work and interact.

Ye Cuihua, 79, doesn't head to the county clinic when she feels a flutter in her chest. She glances at her wrist. Within seconds, her smartwatch syncs with an app called Ant AQ telling her that her blood pressure is slightly elevated. It follows by providing advice to reduce her salt intake, keep monitoring, and call her doctor if the symptoms persist.

"It feels like having someone at home who can always answer," Ye said.

Across China, this scene is playing out with increasing urgency. As the nation's population aged 65 and above doubled from 7 percent to 14 percent in just 23 years — a demographic shift that took France a century to endure — the medical system is hitting a breaking point. The solution isn't just more hospitals; it is "triage at home" powered by artificial intelligence.

China's medical system has long suffered from a basic imbalance: the best doctors and equipment cluster in big cities, while smaller towns and the countryside make do with less.

"For older patients like us, getting care often means a long bus ride, hours of waiting, and the nagging uncertainty of not knowing whether a symptom is serious enough to justify the trip," Ye said.

AI does not fix all of that, but it is beginning to reshape a critical moment that comes before any hospital visit, that is, the moment a person decides whether to go at all.

"For many older adults, the hardest question is not what treatment do I need, but do I need to see a doctor in the first place," Ye added.

AI tools are able to cross-reference symptoms, health records and basic readings from wearable devices, offering preliminary guidance that can turn vague aches and worries into something a person can act on.

Cai Juan, a caregiver at Taikangzhijia, a senior care facility in Wuhan, Hubei province, has witnessed a noticeable change in health awareness among residents in recent years. "Residents who once ignored mild discomfort or panicked over minor symptoms now tend to consult a digital tool first," she said.

"It doesn't replace the doctor," she added. "But it eases the anxiety and sometimes catches things that would have been left too long."