Kunshan South is a high-speed rail station, not an airport, so the honest answer to whether you need travel insurance here is really about the city of Kunshan and its place in the Shanghai-Suzhou corridor rather than about the station itself. Yes, coverage is worth having for a trip built around Kunshan, and the real reason is straightforward: this is a manufacturing and business hub, not a tourist medical-care center. Even a short stop for business or a rail connection benefits from routine medical and trip-delay cover given how tightly high-speed rail schedules run.
Care standards vary across China, and Kunshan's own hospitals handle routine treatment reasonably well, but anything serious is typically referred on to Shanghai, the real medical hub for this entire corridor, a short high-speed rail journey away. Confirm your policy covers treatment and transfer between Chinese facilities, since the referral to Shanghai - not care within Kunshan itself - is the step most likely to involve real cost and coordination. This is a hedge worth taking seriously, since Kunshan's own facilities are not always equipped for complex or specialist cases.
Most visitors here are business travelers connected to Kunshan's manufacturing and technology zone, home to a large concentration of international and Taiwanese-linked companies, or people passing through en route to nearby Suzhou. That business-travel profile matters for insurance too: check that your policy covers work-related travel if your trip is not purely personal, since some standard leisure policies exclude business activity entirely. Confirm whether your policy classifies factory visits or client meetings as business activity requiring a different tier of cover.
Keep hospital invoices and any referral paperwork if you are treated in both Kunshan and Shanghai, since claims involving a transfer between cities need clear documentation of both legs. Many policies also want prompt notice before non-emergency transfer or treatment is arranged, so check the claims process in your policy wording before you travel through this corridor.