Recently, the 'Jiuzhang IV' photonic quantum computing prototype developed by a team led by Pan Jianwei and Lu Chaoyang from the University of Science and Technology of China achieved a significant breakthrough by successfully completing a 3,050-photon-level Gaussian boson sampling task, marking a world-class advancement in the field of large-scale, low-loss photonic quantum interference networks. Currently, the global quantum computing landscape features four mainstream technological approaches: superconducting, trapped ion, neutral atom, and photonic quantum computing. Among these, the photonic quantum route offers unique advantages, including the ability to operate at room temperature, strong photon 'anti-interference' capabilities, and natural compatibility with the future quantum internet. However, photonic quantum computing has long been hindered by the technical challenge of photon loss. Photons can be absorbed or scattered at every step of propagation, coupling, beam splitting, and detection, with the problem worsening as system scale increases. To overcome this challenge, the 'Jiuzhang IV' team employed two innovative strategies: high-efficiency light sources and spatiotemporal hybrid encoding. The high-efficiency light sources minimize losses from the outset. The team independently developed a high-efficiency optical parametric oscillator (OPO) with a single-source efficiency of approximately 92%, boosting the overall system efficiency to around 51%. Spatiotemporal hybrid encoding reduces cumulative losses through 'spatiotemporal multiplexing,' leveraging both spatial and temporal degrees of freedom to construct higher-dimensional, larger-scale quantum networks without the need for a massive increase in components. These two technologies worked in tandem, enabling 'Jiuzhang IV' to achieve large-scale interference with 1,024 input squeezed states and 8,176 output modes, pushing the scale of photon events to the 3,050-photon level. This represents a leap in computing power, opening up a new pathway for the scalable and expandable development of photonic quantum computing and further solidifying China's international leadership in this field.