China's economy likely grew at the slowest pace in 1 1/2 years in the fourth quarter of 2021, dragged down by weaker demand due to a property downturn, curbs on debt and strict COVID-19 measures, all of which are sure to pile pressure on policymakers to roll out more easing steps.

Data on Monday is expected to show that gross domestic product (GDP) grew 3.6% in October – December from a year earlier. That would mark the weakest pace since the second quarter of 2020 and a slowing from 4.9% in the third quarter, a Reuters poll showed.

On a quarterly basis, growth is forecast to rise to 1.1% in the fourth quarter from 0.2% in July-September.

For 2021, China's GDP likely expanded 8%, which would be the highest annual growth in a decade, partly due to the low base set in 2020, when COVID-19 and stringent lockdowns jolted the economy.

The government is due to release the GDP data, along with December activity data, on Monday at 2 a.m. GMT.

The world's second-largest economy, which cooled over the course of last year, faces multiple headwinds in 2022, including persistent property weakness and a fresh challenge from the recent local spread of the highly-contagious omicron variant.

Exports, one of the few areas of strength in 2021, are also expected to slow down while the government continues with its clampdown on industrial emissions.

Ahead of a key Communist Party Congress later this year, policymakers have vowed to head off a sharper slowdown.

The central bank is set to unveil more easing steps, though it will likely favor injecting more cash into the economy rather than cutting interest rates too aggressively, policy insiders and economists said.

Analysts polled by Reuters expect the central bank to deliver more modest easing steps, including cutting banks' reserve requirement ratios and the one-year loan prime rate (LPR) – the benchmark lending rate.

Analysts at ANZ said in a note that they saw a possibility that the central bank will cut the rate on its medium-term lending facility (MLF) on Monday.

Policymakers have also pledged to step up fiscal support for the economy, speeding up local government special bond issuance to spur infrastructure investment and planning more tax cuts.

"We might see a larger effect of the monetary and fiscal easing only in the second half of 2022 due to the transmission lags of these policies," analysts at Natixis said in a note.

"The recent monetary easing and the stabilization of PMI (factory activity) have indicated such a direction, but more efforts are needed to boost fixed-asset investment."

According to the poll, growth is likely to slow to 5.2% in 2022.