Chinese hospitals and funeral homes were under intense pressure on Wednesday as a surging COVID-19 wave drained resources, while the scale of the outbreak and doubts over official data prompted some countries to consider new travel rules on Chinese visitors.

In an abrupt change of policy, China this month began dismantling the world's strictest COVID regime of lockdowns and extensive testing, putting its battered economy on course for a complete re-opening next year.

The lifting of restrictions, which came after widespread protests against them, means COVID is spreading largely unchecked and likely infecting millions of people a day, according to some international health experts.

The speed at which China, the last major country in the world moving towards treating the virus as endemic, has scrapped COVID rules has left its fragile health system overwhelmed.

China reported three new COVID-related deaths for Tuesday, up from one for Monday - numbers that are inconsistent with what funeral parlours are reporting, as well as with the experience of much less populous countries after they re-opened.