The People's Bank of China's (PBOC) call on the nation's major lenders to give priority to first-time home buyers when allocating credit marks a policy shift for the government that has been on a near-five-year tightening campaign to cool the market.

"It's clear that Beijing is concerned about the pace of cooling in the residential real estate market," Dariusz Kowalczyk, senior economist and strategist at Credit Agricole told CNBC.