China's massive export engine sputtered for the second year in a row in 2016, with shipments falling in the face of persistently weak global demand and officials voicing fears of a trade war with the United States that is clouding the outlook for 2017.

In one week, China's leaders will see if President-elect Donald Trump makes good on a campaign pledge to brand Beijing a currency manipulator on his first day in office, and starts to follow up on a threat to slap high tariffs on Chinese goods.

Even if the Trump administration takes no concrete action immediately, analysts say the specter of deteriorating U.S.-China trade and political ties is likely to weigh on the confidence of exporters and investors worldwide.