Dr. Renchao Yang is a professor at the Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology and at the Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Mineral of Shandong University of Science and Technology. He studied sedimentology and petroleum geology. He focuses on tight sandstone reservoirs, gravity-flow deposits and soft-sediment deformation structures of the Triassic Yanchang Formation, and on the Permian Sulige Gas Field in the Ordos Basin now for 20 years. He received 20 research grants in this field and published some 90 articles, both in English and in Chinese. Two of them (published in AAPG Bulletin, 2017, and in the Journal of Geodynamics, 2019) are highly cited. A.J. (Tom) van Loon studied geology in Leiden (Netherlands), where he received his Ph.D. in 1972 for a thesis on the sedimentological development of a Carboniferous intramontaneous basin in Spain. He held various positions in academia and industry, and was a professor of Geology at the University of Silesia (Katowice, Poland) and the Adam Mickiewicz University (Poznan, Poland), and is currently visiting professor at the Shandong University of Science and Technology (Qingdao, China). His main interests are soft-sediment deformation, basin analysis and mass flows. Currently he is involved in the sedimentological analysis of hydrocarbon occurrences in China. He authored, co-authored and edited several books and around 200 scientific publications. He held numerous editorial positions. He is an Honorary Member of the Geological and Mining Society of The Netherlands.