Dr. Qinggang Guo, was a professor visiting from the Plant Protection Institute; Hebei Agricultural and Forestry Science, in Baoding, China. He received his doctor degree in China Agricultural University in 2007. During 2018-2019, Dr. Guo was a visiting scholar in the Lab of Dr. Jorge Vivanco, and worked on the ecological mechanism of Plant Growth-Promoting Rhizobacteria (PGPR). His research interests are focused on the ecology and molecular genetics of biocontrol agents, especially for the members of Bacillus genus.