In the other order, Trump said WeChat "automatically captures vast swaths of information from its users.
Uber Technologies dropped more than 2% in the premarket after the ride-hailing giant posted a bigger loss for the previous quarter than analysts expected.
Analysts polled by Refinitiv expected a loss of 86 cents per share.
China reported a 7.2% increase in exports thanks in large part to strong demand for medical supplies due to the coronavirus pandemic.
Economists polled by Reuters expected exports to fall by 0.2%?
However, Martin Rasmussen of Capital Economics said the upside to Chinese exports growth may be bounded by limited demand for pandemic-related products.