The origin of the cosmic acceleration has been one of the key problems to solve in modern sciences. According to what we know so far, it might be due to the effect of dark energy, or to our misunderstanding of gravity. In this talk, I will explore the possibilities and practicalities of tackling this challenging cosmic acceleration problem using large scale structure surveys including BOSS, eBOSS and DESI. I will also address the issue of tension among different kinds of recent astronomical observations, and offer a solution to release the tension using the dynamical dark energy.

Prof. Gongbo Zhao received his PhD in 2007 from Chinese Academy of Sciences, and worked as a postdoctoral researcher and a research fellow at Simon Fraser University and University of Portsmouth from 2007 to 2012. He joined National Astronomical Observatories as a full professor in 2012.Prof. Zhao is a world known expert in cosmology, especially on the research field of dark energy and gravity using large scale galaxy surveys. He has published over 100 papers on cosmology in refereed journals with over 5000 citations (excluding self-citations). He is the Lead Scientist of the SDSS-IV survey at NAOC, and a working group co-chair of the eBOSS cosmology survey. Due to his academic achievements, Prof. Zhao won the Chinese National 1000 Youth Scientist Fellowship in 2012, and a Royal Society Advanced Newton Fellowship in 2016.