华夏先祖，早在原始社会末期就已发明了筑城技术。在其后四千多年历史中，我们的祖先又以无与伦比的创造精神，把筑城技术发展到了奇、特、绝的程度，并曾运用这些技术修筑了无数坚固而壮丽的“居城”和雄伟而奇特的“塞城”。“居城”成了帝王治国平天下的中心和民众的居住之 Huaxia ancestors, as early as the primitive society has invented the end of the city built technology. For more than four thousand years of history, our ancestors, with unparalleled creativity, developed the technology of fortification into an extraordinary, extraordinary and absolute level and used these techniques to build countless strong and magnificent “hometown” and majesty And strange “plug City.” “Home City” has become the center of imperial rule and the people’s residence in the world