Climate warming has led to significant advancements in the spring phenology of temperate plants,which in turn has considerable implications for the structure and function of terrestrial ecosystems. The timing of flowering is recognized as a crucial determinant of plant reproduction and renewal processes. Previous research has primarily focused on the impacts of climate change on individual phenological events,such as leaf unfolding or flowering in spring. However,the response of the interval between flowering and leaf unfolding to climate change has received comparatively less attention. A comprehensive understanding of the timing of leaf unfolding and flowering,as well as the intervals between them,is essential for understanding how ecosystems respond to climate change. In this study,we focused on two species that are characterized by their early flowering and leaf unfolding:Jasminum nudiflorum and Amygdalus triloba. We conducted manipulative experiments to investigate the effects of spring temperature,photoperiod,and winter chilling on the timing and speed of spring flowering and leaf unfolding,along with the intervals between these two events. The results revealed that under warming conditions of +2°C,+5°C,and +10°C,spring temperature significantly accelerated the rates of leaf unfolding and flowering in both species. Specifically,the leaf unfolding speed was reduced by an average of (8.2±1.2) days for Jasminum nudiflorum and (3.9±1.4) days for Amygdalus triloba,while the flowering speed decreased by (1.1±0.8) days and (5.0±1.4) days,respectively. Increased winter chilling notably enhanced the speed of leaf unfolding for both species but did not show a significant effect on flowering speed. Additionally,spring warming shortened the "flowering-leaf unfolding" interval for Winter Jasmine by an average of (17.0±1.2) days,with no significant effect on Amygdalus triloba. Increased winter chilling significantly reduced the "flowering-leaf unfolding" intervals for both plants; under high chilling treatment,the intervals were shortened by (7.8±0.9) days for Jasminum nudiflorum and (4.1±1.4) days for Amygdalus triloba compared to low chilling treatment. Photoperiod did not have a significant impact on the flowering and leaf unfolding speeds or their intervals for either species. This research provides important insights into the response patterns of spring leaf unfolding,flowering speeds,and the intervals between these two phases in the context of climate change. Understanding these dynamics is crucial not only for enhancing our comprehension of plant ecological responses but also for informing conservation strategies aimed at maintaining the stability and resilience of ecosystems as they confront the challenges posed by ongoing climate change.