China's trade surplus with the United States surged to a record high of $34.13 billion in September from the August figure of $31.05 billion, Chinese customs data reported on Friday, according to Reuters.
China's politically-sensitive surplus with the USA was $34.13 billion in September, surpassing the record of $31.05 billion in August.
"China's trade surplus will keep rising because the domestic economy is cooling down", said Andy Xie, a Shanghai-based independent economist.
Beijing's export data has been surprisingly resilient to tariffs, possibly because companies ramped up shipments before broader and stiffer USA duties went into effect, raising concerns about a sharper drop in export strength once all tariffs kick in.
"We expect the dynamic to change once we get a bit deeper into this, but for now China is trying to outrun the next round of tariffs", he said.
Analysts said last month's strong export growth - which might indicate USA tariffs are not biting much yet - is unlikely to be sustained.
The volume of exports from China to Russian Federation has grown by nearly 13 percent, exceeding $35 billion.
Over the first nine months of the year, China's surplus with its largest export market totaled $225.79 billion, compared with about $196.01 billion in the same period last year.
"Their economy has gone down very substantially and I have a lot more to do if I want to do it", Trump said in an interview with Fox News.
Last month, trade turnover between the two countries was more than $9 billion.
Export numbers have been buoyed by producers rushing to fill orders before American tariffs rose, but they also benefit from "robust USA demand" and a weaker Chinese currency, which makes their goods cheaper overseas, said Louis Kuijs of Oxford Economics in a report. The US dollar has strengthened against a range of currencies this year as American interest rates have risen.
He also blamed previous USA presidents for allowing China to pursue unfair trade practices and said he had to tell Beijing, "It's over".
The International Monetary Fund this week cited the trade war as it lowered its 2019 growth forecast for China, which is set to see its slowest expansion since 1990.
The IMF also lowered estimates for the United States and the global economy as a whole.