China’s Unitree Robotics has filed for a long-awaited initial public offering (IPO) on Shanghai’s Star Market, seeking to raise about 4.2 billion yuan (US$607.8 million). Widely seen as a bellwether for China’s emerging humanoid robotics industry, Unitree’s listing, if approved, could become a landmark test of investor appetite for so-called embodied AI companies. Here is what you need to know about Unitree, including how it makes a profit while peers are still burning cash, its shareholder...