BEIJING—China's industrial sector showed signs of rebounding more strongly in August, opening space for leaders to focus on overhauls rather than steps to stimulate short-term growth.
Industrial output in August climbed 10.4% year-to-year, up from 9.7% in July and the highest growth rate since March 2012.
Meanwhile, total social financing, a broad measure of new credit in the economy, came in at 1.6 trillion yuan ($259.4 billion), up sharply from July's 808 billion yuan.
Speaking at a closed-door meeting of executives at the start of the World Economic Forum in Dalian on Tuesday, Premier
Li Keqiang said August data showed an improving trend, and that the focus of policy would be on measures to support long-term growth.
"When there's downward pressure on growth, one choice is to adjust economic policy, increase deficits, relax monetary policy. That might have a short-term benefit, but may not be beneficial for the future," he said, according to a transcript of the meeting published on the government's website.
Instead, Mr. Li said the government would focus on structural overhauls, pledging to push ahead with moves to liberalize interest rates, open the capital account and strengthen financial supervision.
"Getting the work on controlling risks right, means it's possible to accelerate financial reform," he said.
Economists said stronger industrial output signaled an end to the slide in growth seen in the first half of the year.
"Overall, these data are very strong," said Ma Xiaoping, who covers the Chinese economy at HSBC. "Growth in the third and fourth quarters will sustain a modest recovery."
Humming factory-production lines add to confidence that China's government will hit its 7.5% gross-domestic-product growth target for the year, after a slide in growth in the second quarter to 7.5% year-to-year from 7.7% in the first raised fears of a rare miss.
Still, with a fresh surge in credit helping support the stabilization, some economists doubted how long it could be sustained.
The ratio of corporate and household debt to GDP rose to 170% at the end of 2012 from around 120% in 2008, a sharp increase that raises fears of excess leverage in China's firms and instability in the financial system.
In June, the central bank, aiming to choke off reckless lending, engineered a credit crunch that alarmed markets.
Also raising concerns: The acceleration in factory output appeared tilted toward heavy industry and investment.
"Stronger data over the last couple of months have settled nerves about a possible hard landing, but there are strong echoes of the turnaround in 2009," said Mark Williams, China economist at Capital Economics. "The economy is once again being propelled, unsustainably, by state-led investment."
Meanwhile, China's labor markets also appeared to be stabilizing.
A survey of 4,219 employers by Manpower Group found the share of those planning to increase headcount in the fourth quarter edged up to 16%, from 14% in the third quarter. The share planning to decrease headcount stayed flat at 2%.
Asian markets were cheered by the data on Tuesday. In Hong Kong, the China-dominated Hang Seng Index ended the day up 0.99%. On the mainland, stocks in Shanghai rose 1.2%, extending Monday's gains.
The sharp increase in credit reflected growth in nontraditional lending, with bankers' acceptance bills surging to 304 billion yuan, after contracting in June and July.
"If regulators are strict in controlling off-balance-sheet lending, the increase in credit will be difficult to sustain," said Li Wei, China economist at Standard Chartered Bank.
The tilt toward capital spending was evident in fixed-asset investment, which advanced to 20.3% year-to-year growth in the first eight months of the year, up from 20.1% in the first seven months.
Stronger infrastructure spending by the government was a factor, with spending on highways accelerating.
Crude steel output rose 12.8% from a year earlier, after 6.2% growth in July. "Steel prices had rebounded by July, with 86 major steel mills posting strong profit levels," the China Iron and Steel Association said in a report last week.
Despite a surge in sales in the first half, investment in new property remained lackluster, with new residential floor area under construction up just 3.3% in the first eight months of the year as developers focused on clearing inventory rather than breaking ground on new projects.
Domestic consumption, which the government wants to play a larger role in driving growth, showed more modest improvements. Growth in retail sales edged up to 13.4% year-to-year growth in August, from 13.2% in July. Car sales remained stable, up 10% after July's 9.9% improvement, according to the industry association.
China's ruling Communist Party is expected to weigh far-reaching changes to areas including interest rates and the tax system at a meeting of senior leaders in November.
The timing of that meeting reduces the chances of a repeat of June's crackdown on reckless lending.
"Growth and financial stability are still highly valued for new leaders in the run-up," said Bank of America Merrill Lynch economist Lu Ting. "It's unlikely for [Premier Li] to intentionally destabilize the financial system in the near term."
—Grace Zhu, Chuin-Wei Yap and Liyan Qi contributed to this article.