1Review on the study of plane model of subway stationZhang Yi, Zhou Zhenghua, Han Yi, Wei XinReview145-1532Discussion on the essence of earthquake early warningZhang Chaojun, Chen Huizhong, Shen Ping, Li Ming, Zhao GuofengArticles154-1603Analysis on the current situation and problems of construction and management of emergency shelter in cities of ChinaLi Haijun, Zhang Yaowen, Yang Yueqiao, Liu JinghuiArticles168-1754Overview of the relocation of Yunxian Seismic Station in Yunnan ProvinceCao Bailun, Kuang FujiangArticles176-182