类星体是上世纪60年代四大天文发现之一，其巨大的辐射能量被认为是来自于星系中心超大质量黑洞对周围物质的吸积过程。作为最亮的活动星系核,类星体是探索遥远宇宙结构和研究星系与超大质量黑洞演化的重要探针。本报告将首先简要回顾类星体的发现历史以及已有的类星体巡天。其次重点介绍我国在郭守敬望远镜(LAMOST) 类星体巡天、银道面背景类星体巡天和极亮高红移类星体巡天上取得的科研进展。最后，本报告将展望未来，探索如何利用中国空间站巡天空间望远镜(CSST)等开展类星体巡天和超大质量黑洞等研究。

The nature of dark energy remains a central mystery in cosmology. While LCDMprovides a robust framework, dynamical alternatives such as quintessence offer testabledeviations. In this talk, l will present constraints on three quintessence models-thawing,tracker, and scaling-freezing using the first detection of the Integrated Sachs-Wolfe(1SW)-thermal Sunyaev-Zeldovich (tSZ) cross-correlation (lbitoye et al. 2024). Beyond darkenergy, our results reveal connections between large-scale structure and stellar feedbackgas pressure profiles, and magnetic fields that may influence both the tSZ signal and cosmicray propagation paralleling processes seen in solar system plasmas. While focused orcosmology, this work opens pathways for multi-scale joint analyses combining cosmologicaland even heliophysical datasets to simultaneously probe dark energy and the physics ofcosmic baryons.

弥散伽马射线一般认为产生于宇宙线和星际介质的相互作用，因此是研究宇宙线分布和传播模型的重要探针。TeV以上能段的弥散伽马射线需要地面实验测量，受限于灵敏度而长期以来精度不高。我国建造的高海拔宇宙线观测站LHAASO以其超宽能段覆盖和超高观测灵敏度，显著地改善了这一局面。本报告将介绍拉索对TeV-PeV能段银盘弥散伽马辐射的精确测量以及对观测结果的可能物理解释。

Circum-Galactic Medium (CGMs) are multi-phases, key to understand the galaxy ecosystem and its accretion and feedback. Mapping the circumgalactic medium (CGM) in emission is one of the important scientific goals for astronomers to either use the modern ground-based telescopes or the future space missions. In this talk, I will overview the frontiers of CGMs, emphasizing the warm-hot phase, which is believed to be the baryons reservoir of the missing baryons. I also overview the related observation strategies in the world as well as some explorations in China. I I will highlight the prospects in CGM fields based on the existing and future facilities (such as SMILE, CSST, CAFÉ, HUBS etc.) in China.

暗物质的物理本质属性是国际重大科学前沿。一种常用的研究手段是间接探测，就是在伽马射线和宇宙线数据中去证认暗物质湮灭或衰变的产物。我将介绍悟空号卫星项目以及国内外试验在暗物质间接探测方面所发现的部分候选信号，最后将介绍紫金山天文台等单位正在协同推进的甚大面积伽马射线空间望远镜计划。