Xiaomi founder and CEO Lei Jun has posted a video of himself dropping a watermelon from a height to test what he described as a “bulletproof” coating developed by the Chinese tech giant. The widely shared video posted on March 19, 2025, shows the watermelon surviving intact after it was tossed from the sixth floor of the company’s car factory. Lei said a coating on the watermelon is the same applied to battery packs for the SU7 Ultra, Xiaomi’s latest electric car model.