邀请团队:　抚仙湖太阳基地

摘要：　　 In this talk, I review the recent progress of observations of solar flares and Coronal Mass Ejections in the context of underlying evolution of magnetic fields. The key results include: (a) Surface magnetic fields change rapidly and irreversibly after most large flares; (b) Fields turn to more horizontal at flare neutral lines, and slightly more vertical in the outside penumbra, from both observation and MHD simulation; (c) Implosions (contraction in the early stage of flare) are evident in a number of events with high cadence and high resolution observations; (d) Sudden motion of sunspots may contribute to Sun-quakes; (e) Flares may comb newly discovered "uncombed" structure in sunspots.