Optoelectronics and circuit system: RISC-V chip design, photonic integrated chip, 3D sensing, AI chip, 5G/6G mobile communication chip, IoT chip, radio frequency integrated chip, power management integrated circuit, high-performance analog-digital converter circuit, signal processing and control integrated circuit, hardware-software co-design, high-end health care chip, micro medical device, human body wireless sensor network, intelligent diagnosis and treatment, and surgical robot circuit design.