China produces 300% of the existing market of EVs as it stands, and the government is trying to further increase production. The manufacturers have been found to dump finished EVs into fields by the hundreds to claim the government benefits.
Their actions are dumping in the literal sense, and is illegal when it comes to international trade, so there is no reason to withdraw such tariffs until they stop overproducing at the minimum.
Not to mention that Chinese EVs spontaneously combust for the most bizarre reasons and have caused countless problems, like the e-bike that spontaneously combusted in Toronto's subway due to it "not rated for cold weather," or the container ship that caught fire because of a Chinese EV started a runaway reaction inside of a container, or the countless videos of Chinese EVs catching fire while parked in China itself.