This year the government set up the target of trade growth at 6%, which at this moment, is still impossible to achieve, particularly with the weak imports."
Domestic demand in China continues to be weak despite stimulus measures by the government and central bank to boost growth.
The central bank had lowered interest rates just last month, which was the third time in six months to spur lending and economic activity.
The drop in imports led China's trade surplus to $59.5bn in May, up nearly 75% from April.