Gang Liu graduated from Lanzhou University majoring in preventive Medicine and works in Gansu Provincial Center for Disease Control and Prevention. He is mainly engaged in the research of occupational health monitoring, radiation epidemiology and biological dose estimation of radiation workers. The chromosome biological dose estimation technology is at the forefront of China and has reached the international advanced level.The 2011 IAEA Manual Cytogenetic Dosimetry Revision Based on the following Data is published online in Radiosensitivity and Dose Rate Research Results published in the FASEB Journal.