On 30th July, the 21^st Henan University Biweekly BioMed Seminar (HU-BBS) was held. Professor Xu Xiaodong of School of Life Sciences delivered a keynote report titled Biological Clock and Adaptation to Environmental Change. Over 40 experts and scholars were present at the seminar. Nearly 20 young doctors from neurology department of the First Affiliated Hospital of Henan University watched the live-streaming report and discussed the related issues via online platform.