div class=ts-pagebuttonPage 1button div class=ts-image a href=https:reader042vdocumentinreader042viewer20220309085b50cff47f8b9ac4368b6121html5page1jpg target=_blank amp-img class=ts-thumb alt=Page 1: Open System Sun Jiangning · You cannot step twice into the same river Heracleitus Eastern Author: Sun Jiangning The College of Architecture and Urban Planning TJUShanghai src=https:reader042vdocumentinreader042viewer20220309085b50cff47f8b9ac4368b6121html5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divdiv