In this paper, we analyze the amplitude scintillation recorded by the GPS and BeiDou Systems (BDS) at the low-latitude station, Kunming (24.7°N,102.9°E, geomagnetic latitude 15.1°N) in China. This station is located near the northern equatorial ionization anomaly. Our study covers the years 2020-2022 and aims to illustrate the temporal variation of scintillation for the first time. Our results show that there was minimal scintillation during the relatively low activity years of 2020-2021, but a significant increase was observed in 2022. The monthly rates of occurrence were less than 1% (except for 1.8% in October 2022) during these three years. The highest probability of occurrence was in October and the lowest in January. In terms of seasons, the lowest probability of scintillation occurred during the June solstice and the highest during the September equinox. The statistical results of the Complementary Cumulative Distribution Function for months and seasons clearly show the specific distribution of amplitude scintillation and are consistent with our calculated results. Our correlation analysis reveals that the influence of sunspots varies in different seasons, with the minimal correlation coefficient occurring during the June solstice. The variation of amplitude scintillation of GPS and BDS signals exhibit similar trends on a daily, monthly, and seasonal scale, as well as with solar activity. This suggests that the signals from these two systems can effectively reflect the ionospheric environment. The scintillation is recorded during the daytime, which is a problem worthy of attention and research.