MENG Tianhua, ZHAO Guozhong, WANG Haohang, LIU Hongmei, REN Jianguang, HU Weidong, LU Yuhe, LI Wenyu. Research progress of terahertz nondestructive testing in the field of cultural relic[J]. Journal of Terahertz Science and Electronic Information Technology , 2023, 21(2): 157