Group 1 - The optical communication sector is experiencing a collective rebound, with notable stock price increases for companies such as Huahong Semiconductor (up 5.69% to HKD 94.8), Jingxin Communication (up 5.44% to HKD 2.52), Hongteng Precision (up 5.66% to HKD 4.67), and Huiju Technology (up 2.11% to HKD 14.99) [1][1][1] Group 2 - At CES 2026, NVIDIA announced the Rubin architecture, which is a significant milestone in its data center hardware roadmap, integrating CPU, GPU, DPU, NIC, NVLink interconnect, and Ethernet switching into a comprehensive solution [1][1] - The primary goal of the Rubin platform is to significantly enhance AI performance and energy efficiency, with single GPU AI inference performance improving by 5 times and training performance by 3.5 times compared to previous generations [1][1] - Shanxi Securities released a report indicating that Rubin Ultra is expected to become a crucial milestone for the large-scale industrialization of Scaleup CPO, with Trainium4 and TPUv8 anticipated to be important drivers for CPO/NPO in 2027/28 [1][1] - Key investment aspects of CPO include high-density plug cores and extensive fiber optics resulting from shufflebox and multi-segment fiber wiring, advanced packaging of OE, and a large number of customized FAUs [1][1]