China posted a steep jump in daily Covid-19 infections on Tuesday, with new cases more than doubling from a day earlier to hit a two-year high, raising concerns about the rising economic costs of the country's tough containment measures.

A total of 3,507 domestically transmitted cases with confirmed symptoms were reported on Monday across more than a dozen provinces and municipalities, up from 1,337 a day earlier, the National Health Commission said. Most of the new cases were in the northeastern province of Jilin.

Though China's caseload is still tiny by global standards...