2014.2 -  Nanjing Institute of Geology and Palaeontology, CAS.  Professor.

　　2013.9 – 2013.12  School of Earth and Ocean Sciences, Cardiff University (UK), Advanced Academic Visitor. 

　　2011.7- 2018.12 Science communication web: Fossil web (http://www.uua.cn/), Chief executive. 

　　2009.3 – 2010.3, Cardiff University (UK), Postdoctoral.

　　2009.1- 2014.1  Nanjing Institute of Geology and Palaeontology, CAS. Associate Professor.

　　2000.9 - 2006.9  Nanjing Institute of Geology and Palaeontology, CAS. Ph.D

　　2000.7, Nanjing University. Bachelor of Science.

　　1) Biodiversity and evolution of early land plants and their palaeoenvironment background.

　　The related study includes Devonian floras reconstruction and comparison based on plant fossil materials from Xinjiang China, South China, New York State (USA), Venezuela and Antarctica; fossil plant systematics, taxonomy, palaeophytogeography and evolutionary botany; and growth model of the earliest forest-forming plants.　 

　　2) Quantitative and systematical study and artificial intelligence of palaeontology and stratigraphy.

　　The related study includes analyzing and mining big data of palaeontology and stratigraphy to discover potential knowledge; powering Geobiodiversity database, fossil images database and their websites (geobiodiversity.com and fossil-ontology.com); understanding the ontology of ancient organisms in the geological ages.  

　　3) Science communications.

　　Organic combination of scientific research and science communication work. Writing scientific books and articles and giving open talk to the public.

　　九三学社江苏省委：2015, 2016年度社会服务先进个人 

　　Zheng D, Chang Su-Chin, Algeo T, Zhang H, Wang B, Wang H, Wang J, Feng C, Xu H-H *, 2020. Age constraint for an earliest Famennian forest and its implications for Frasnian-Famennian boundary in West Junggar, Northwest China. Palaeogeography, Palaeoclimatology, Palaeoecology. 552, 109749.

　　Xu H-H, Wang Y, Tang P, Fu Q, Wang Y. 2019. Discovery of Lower Devonian plants from Jiangxi, South China and the pattern of Devonian transgression after the Kwangsian Orogeny in the Cathaysia Block. Palaeogeography, Palaeoclimatology, Palaeoecology. 531, 108982.

　　Wang Y., Xu H-H, Wang Y, Fu Q, 2018. A further study of Zosterophyllumsinense Li and Cai (Zosterophyllopsida) based on the type and the new specimens from the Lower Devonian of Guangxi, southwestern China. Review of Palaeobotany and Palynology. 258, 112–122.

　　Wang D-M, Zhang Y-Y, Liu L, Xu H-H *, Qin M, Liu L, 2017. Reinvestigation of the Late Devonian Shougangiabella and new insights into the evolution of fern-like plants, Journal of Systematic Palaeontology. http://dx.doi.org/10.1080/14772019.2017.1289269

　　Xu H-H, Berry CM, Stein W, Wang Y, Tang P, Fu Q. 2017. Unique growth strategy in the Earth’s first trees revealed in silicified fossil trunks from China. PNAS. 114, 12009–12014.

　　Xu H-H, Wang Y., 2016. The earliest cormose rhizomorph of putative lycopsid affinity from the Middle Devonian of West Junggar, Xinjiang, China. Review of Palaeobotany and Palynology, 226, 54–57.

　　Wang D-M, Xu H-H *, Xue J-Z, Wang Q, Liu L, 2015. Leaf evolution in early-diverging ferns: insights from a new fern-like plant from the Late Devonian of China. Annals of Botany, 115: 1133-1148

　　Xu H-H, Xue J-Z, Wang Q. 2015. Notes on a fertile rhyniophytoid from the Lower Devonian of Guangxi, southwestern China. Historical Biology: An International Journal of Paleobiology. 27, 294-298.

　　Xu H-H, Marshall JEA, Wang Y, Zhu H-C, Berry CM, Wellman CH. 2014. Devonian spores from an intra-oceanic volcanic arc, West Junggar (Xinjiang, China) and the palaeogeographical significance of the associated fossil plant beds. Review of Palaeobotany and Palynology. 206: 10-22.

　　Xu H-H, Wang Y, Wang Q, 2012. A new homosporous, arborescent lycopsid from the Middle Devonian of Xinjiang, Northwest China. Palaeontology, 55: 957-966.

　　Xu H-H., 2019, Stories of fossils and strata. Beijing: Science Press, 1-175.

　　Strategic Priority Research Program of the Chinese Academy of Sciences (Grants: XDA19050101) [2018-2022]

　　Strategic Priority Research Program of the Chinese Academy of Sciences (Grants: XDB26010502) [2018-2022]

　　National Natural Science Foundation of China (Grants 41772012) 

　　Fund of State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China