In this paper, the authors carry out the analysis on the trends of strong earthquakes along each active tectonic boundary from three aspects, respectively, including the characteristics of the Load/Unload Response Ratio time series evolution, probability method based on the lognormal distribution function, and b value variations. Strong earthquake criticality on each active tectonic boundary is also estimated in terms of the characteristics of the Load/Unload Response Ratio time series evolution, investigating both cumulative probabilities and conditional probabilities and the decrease of the b value. Finally, possible areas where strong earthquakes might occur in next five years in Chinese Mainland are discussed.oft-com:office:office" />