Nature is the home for human survival and development. The ideal state of the planet is the harmonious relationship between man and nature. For thousands of years, the holis-tic concept of ancient Chinese philosophy, i.e., theory of harmony, has influenced Chinese thoughts and formed the roots of China's traditional eco-agricultural practices. Some of the ingenious agricultural systems were listed as Globally Important Agricultural Heritage Systems (GIAHS) sites by Food and Agriculture Organization of the United Nations. On the World Environment Day of 2021, Center for Natural and Cultural Heritage (CNACH) of the Institute of Geographic Sciences and Natural Resources Research (IGSNRR), the Chinese Academy of Sciences held a forum of review and prospect to celebrate its 15th anniversary in IGSNRR, reflecting the theme 'Harmonious Coexistence for Man and Nature' of this year. More than 180 participants from governments, research institutes and universities at-tended the meeting. Mr. Parviz Koohafkan, president of the World Agricultural Heritage Foundation and Mr. Yoshihide Endo, coordinator of the GIAHS, sent their video congratu-lations, respectively.