The economy needs to grow at least 6.5 percent between 2016 and 2020 to meet Beijing's goals of doubling GDP and per capita income by 2020 from 2010 levels. But they have also pledged "decisive results" by 2020 on a wide range of reforms to let market forces play a bigger role in driving the economy away from inefficient state-owned enterprises, which in the short term could slow output.
Last year's expected growth of 6.7 percent, though the slowest in 26 years, will have given the government a little more room to manoeuvre, but Beijing will not tolerate a sharp slowdown ahead of the leadership transition, the policy sources said.
The 2017 growth target will be announced at the annual meeting of the National People's Congress, the country's parliament, in early March.
The sources said government was set to maintain a 3 percent inflation target this year, suggesting policymakers are less worried about a sharp surge in consumer prices, despite surging factory-gate costs in recent months.
December consumer prices rose 2.1 percent from a year earlier, easing from a 2.3 percent rise in November, while producer prices jumped 5.5 percent in December year-on-year, the most since September 2011.
China's producer price jump, fuelled by rising commodity prices, has yet to filter into consumer prices due to weak demand, so the central bank is not yet under big pressure to tighten policy.
Even if inflation hits 3 percent in some months this year, the central bank would have to assess whether the economy is on a solid footing before raising interest rates, which may help the struggling yuan, the policy sources said.
"If you don't want the exchange rate to depreciate, you should tighten credit, but there could be problems in debt prices and market liquidity - how to balance them is a very difficult thing," one of the sources said.