China's economy, though facing headwinds, has maintained steady growth over the first three quarters of this year, as the country's economic structure continued to optimize, said the country's top economic regulator.

Yuan Da, spokesperson for the National Development and Reform Commission, said China's economy is facing relatively big downward pressure amid a rise in uncertainties and the complicated and challenging environment at home and abroad.

The economy, however, showed stable growth signaling high-quality development in the first nine months, Yuan said on Oct 21 at an NDRC news conference held in Beijing.

China's GDP grew by 6.2 percent in the first three quarters, the fastest among major economies worldwide, according to official data.

"China's economy is shifting from the phase of rapid growth to a stage of high quality development. It is acceptable to see the growth surge or dip slightly, as long as we see the increase in residents' incomes, the improvement of the ecological environment and high-quality development," Yuan added.

In the third quarter, the added value of the emerging strategic industries and the added value of high-tech manufacturing jumped 8.4 percent and 8.7 percent year-on-year respectively, 2.8 percentage points and 3.1 percentage points higher than that of the overall industries.

Yuan said China has the conditions, the capability and confidence to achieve the steady, healthy and sustainable growth of the economy and meet the annual target of socioeconomic development. In the first three quarters, the number of newly employed people in urban areas totaled 10.97 million, which was 99.7 percent of the full-year target.

The NDRC said it will take more steps to stimulate investment and ensure stable economic growth, as part of its ongoing efforts to foster a robust domestic market.

A number of dedicated railway projects are planned from 2019 to 2020, with an overall investment of 120 billion yuan ($17 billion), the NDRC announced on Oct 21.

The NDRC approved 35 fixed-asset investment projects in the third quarter, primarily in the fields of transportation and energy. Overall investment was 317.2 billion yuan. In September, the NDRC approved 14 fixed-asset investments, compared with nine projects in August.

"In general, China's economy continued its steady run amid the rise of uncertainties and the Sino-US trade conflict, with the main macroeconomic indicators remaining in the reasonable range," Yu Chunhai, a researcher at the National Academy of Development and Strategy of Renmin University of China, said in a report published at a macroeconomy forum on Oct 21 in Beijing. "While global growth remains sluggish, Chinese economic growth was the fastest among major economies worldwide."

"More efforts are needed to create a favorable monetary and financial environment for quality economic development," Yu said in the report.

"China needs to deepen high-level economic and trade cooperation with Japan, the Association of Southeast Asian Nations, the European Union, Russia and countries and regions involved in the Belt and Road Initiative. And China also needs to actively participate in and promote the development of a rules-based international trade and investment system."