Yunyinggu Technology

Yunyinggu Technology (Viewtrix Technology, 03310.HK) is a Chinese display-driver chip design company, founded in 2012 and led by chairman and CEO Gu Jing. It runs a fabless model, making AMOLED display driver chips mainly for smartphones plus Micro-OLED display backplanes/drivers for VR/AR devices; it was the first mainland-China AMOLED driver chip maker to pass brand-customer certification and the only mainland vendor with cumulative shipments to brands exceeding 10 million units. By 2024 sales volume it ranked as the world's fifth-largest smartphone AMOLED display driver chip supplier and the largest in mainland China, and second globally in Micro-OLED backplanes/drivers; its chips ship to over 10 product series at brands representing more than a quarter of the global smartphone market. Qiming Venture Partners led its Series C in 2019, followed on in the Series D, and held 7.39% as the largest institutional investor pre-IPO; Vertex Ventures China was also an investor. On May 27, 2026 it listed on the Hong Kong Stock Exchange at HK$20.81 per share, opening at HK$25.48 for a market cap of HK$10.9 billion.