Early Shang Dynasty thought was based upon cyclicity.
商代早期的思想是根据旋回。
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Sequences tend to show cyclicity of changes in relative sea level and widespread unconformities, processes of sedimentation and sources of sediments, climate and tectonic activity over time.
The activity trend of shallow and deep earthquakes in Northeastern China before 2005 has been estimated in this paper according to seismic natural cyclicity and astronomical period incident etc.