The founder of a fast-rising Chinese tech firm has become known as China’s “crazy boss” after a string of online stunts.Yu Hao, 39, from Jiangsu province in eastern China, is the founder and CEO of Dreame Technology, a smart home appliance maker best known for high-end robot vacuum cleaners.Founded in 2017, Dreame has grown rapidly in China’s crowded smart appliance sector.Public records show the company was once valued at about 45 billion yuan (US$6.6 billion) and it is reportedly aiming for...