The remarkable turnaround comes as China has mostly eradicated the virus, and contrasts with the sluggish comebacks seen in major industrialised peers, where factories are still struggling with pandemic disruptions and the hit to demand.

China’s global export share increased to more than 13 per cent in the second and third quarters from 11 per cent last year, according to Nomura, resulting in the highest share percentage for any quarter since at least 2006 when the investment bank started compiling the data.

Government data shows that, in November, there were more people employed in the industrial sector in Jinhua city, which includes the eastern export hub of Yiwu, than there had been at any time since end-2017.

“We laid off about 50 workers in the first half, and now with orders soaring, we’re short of staff and not able to further ramp up production,” said Deng Jinling, who owns a thermal flask factory in Yiwu, selling to the Middle East, US and Europe.

“We tried hiring dozens of temporary workers, but they’re not good enough,” Deng said.

Some workers she laid off have found jobs back home and are not willing to travel back just a few months before the upcoming Lunar New Year holiday period in February.

But with clients chasing her heels, Deng bought two automated production lines at the end of November to boost efficiency.

“We’ve never thought about doing this before, but this year has been so busy, and we’ve exhausted our options,” she said. “One automated production line is the equivalent of 10 workers.”

A private index by Renmin University tracking demand for blue-collar labour hit a record in the third quarter. Some factory managers have hiked wages by 25 per cent to 10,000 yuan (US$1,530) per month – well above the average starting wage for graduates, according to local media.

For China’s bicycle industry, 2020 has been the best year in a decade, with consumers abroad craving exercise and ways to avoid public transport, said Liang Xiaoling, general manager at Guangzhou-headquartered Trinx Bikes.

“Our capacity maxed out in September and October, and we hired a lot of temporary workers to catch up with the demand,” Liang said, adding that orders are stretching into 2022.

His factories now employ about 100 extra temporary workers, on top of 1,000 or so regular staff.

Although manufacturing investment was slow to recover, falling 3.5 per cent over the first 11 months, strong export demand helped it rebound in the last quarter.

Investment jumped 12.5 per cent year on year in November, up from 3.7 per cent in October, according to research from analysts at CICC, an investment bank.

Zhang Qinming, who owns a company manufacturing speakers for European and American markets, says demand is 25 per cent higher than in previous years.

He has been paying his normal staff overtime to keep up and has also hired temporary workers for about 18-19 yuan an hour, 20 per cent more than his full-time workers. As a last resort, he has leased other factories to take the load.

A labour crunch is not the only constraint.

China’s lopsided trade balance – exporting three containers for every one imported recently – and delays in containers returning to China due to the pandemic overseas, have created severe shipping bottlenecks, now starting to pinch exports.

Despite the red-hot demand, Liang, of Trinx Bikes, said profits are being squeezed. “Some of our orders are already seeing some losses,” he said.

But for policymakers, the export boom has been a welcome one in a tough year. The surprising resilience of China’s export sector, which employs around 180 million people, has reduced the need for massive stimulus to revive the economy this year, analysts said.

China hit 122 per cent of its annual job creation target by end-November.

But manufacturers do not expect this boom to last as other economies ramp up production.

“It started with the pandemic, so it will end with the vaccine roll-out,” Liang said.