China's gross domestic product grew 6% at the end of September, the weakest quarterly growth since 1992, and government statistics published on Friday of 6.2% in the previous quarter. It also missed the forecast of 6.1% growth predicted by analysts surveyed by Refinitiv.
The numbers came just a week after the US and China signed a temporary ceasefire to inflict more damage on the world's two largest economies.
The leading US and Chinese trade negotiators reached a preliminary trade agreement last Friday. It includes a suspension of US tariff increases, which should come into force earlier this week. Trump also told reporters that intellectual property, financial services and agricultural purchases were included in the deal.
However, the two sides still seem far from completing a comprehensive deal, and the latest announcement is not the biggest trade problem on the table for some of the problems.