Shanghai Stonehill Technology Co., Ltd., together with its subsidiaries, provides internet information services in China. The company develops software products, including 2345 Website Navigation, Browser, Security Guard, 2345 HaoZip, Image Viewer, Input Method, 2345 Weather Forecast, and Qingniao Wallpaper. It also provides Nullmax, a platform which offers various driver assistance features. In addition, the company engages in the research and product development in areas, such as brain-computer interface decoding algorithms and systems, diagnosis and assessment of non-organic brain diseases comprising epilepsy, depression, and severe insomnia, as well as regulation of the brain's internal state, and commercialization of research results; and equity investment and financial product investment activities. Further, it is involved in integration, development, consulting, sales, and service of computer software and hardware systems and related systems; and export and import of machinery, equipment, spare parts, and raw materials. The company was formerly known as Shanghai 2345 Network Holding Group Co., Ltd. and changed its name to Shanghai Stonehill Technology Co., Ltd. in August 2023. Shanghai Stonehill Technology Co., Ltd. was founded in 1989 and is based in Shanghai, China.