A Comparative Study of Sanxingdui and Ancient Egyptian Pyramid Solar Calendar Civilizations from the Perspective of the Pythagorean Frustum – An In-depth Analysis Based on Geographical Selection, Energy Systems, Technological Blockade, and Civilizational Rise and Fall

This paper is a historical and cultural research work based on personal academic interest and public archaeological materials. It is an exploratory study focusing on the comparative analysis of Sanxingdui and ancient Egyptian pyramid civilizations from the perspective of geographical environment, energy collection, solar calendar, and civilizational evolution. This study is an extended historical topic derived from the observation and thinking of photon-related phenomena, aiming to expand the horizon of history and civilization enthusiasts. It is independent of the formal Pythagorean Frustum theoretical system and only represents a kind of historical discussion and cultural exploration for interest purposes.