Demand is weakening globally, not just in the United States.
Net exports actually dragged on China's growth by 8.6 percent last year, Reuters calculations based on official data showed.
Trade negotiators are facing an early March deadline and Washington has threatened to sharply hike tariffs if there are no substantial signs of agreement.
White House officials have given markedly different views on progress so far. China's Vice Premier and lead negotiator Liu He is due to visit Washington for the next round of talks at the end of the month.
To free up more funds for lending, particularly to vulnerable smaller firms, the central bank has cut the amount of reserves that banks need to set aside as reserves (RRR) five times over the past year, and guided borrowing costs lower.