Shenzhen-based Kunwei Technology has raised a ¥400 million round joined by new investors XVC and Sequoia China, with existing backers Sherpa and Tencent adding more. The company says it abandoned the industry's push for higher frequencies and instead pairs low-frequency ultrasound with a self-developed deep-learning model that processes roughly 10GB of raw echo data per second, producing real-time high-resolution images of brain tissue and blood flow through the intact skull; it plans to sell both hardware and its kOS software platform to brain-computer-interface and NeuroAI researchers. Kunwei says it has booked tens of millions of yuan in orders, though the imaging comparison shown to reporters has not been independently verified and no regulatory approvals were disclosed.