Parameters of temperature sensivity to the ecliptic inclination are computed, with feedbacks of various zenith angles. of vegetation albedo and of latent heat being considered. Computation reveals the significance of feedback due to zenith angle in the Presence of ice or snow cover and the important role played by the feedback mechanism in the Milankovitch ice-age theory. The background global macroclimate in the ice age yields immense influence on the climate of East China. On the basis of the investigation of the Quaternary Period climate accomplished for the Lu shan Mountain, similar computations are performed on temperature and balance of mass of snow and ice for the Huangshan and Tianmushan, indicating that the low temperatures during spring and autumn are favorable for snowfall and ice accumulation.Altitude of the snow line over East China during the Quaternary Period is theoretically inferred and found to be consistent with that determined by geological study. It is further found that, with their advantageous topography. net accumulation of more than 200 meters of snow or ice may be attained over the Huangshan in 500 years, and about 100 meters for the Tianmushan.