I've just arrived on a flight from Shanghai. My fellow passengers, mostly Chinese, seemed to have no difficulty in entering at CNX, apart from some who appeared unaware of the DTAC requirement, but that's a separate issue.
That's not true. I've just come from Shanghai to CNX. The WiFi at Shanghai Airport worked just fine and, with my VPN, I was able to access all my usual Internet connections.
I use an annual multi-trip travel insurance that costs £450 annually and allows up to 90 days per trip. Perfect for me but wont work with the OA though.
I tried that before they introduced the health insurance requirement. It worked fine, just used my regular travel insurance. Since then they've introduced an onerous health insurance requirement. Non-starter now.