 The study found that the spread of carbapenem-resistant bacterial strains in China is due to the transfer of genetic material between different strains. This includes the transfer of genes that confer resistance to antibiotics like carbapenems, as well as genes that confer resistance to other drugs. Additionally, the study also found that certain mobile elements are responsible for the spread of this genetic material. This article was authored by Rong Zhang, Lizheng Liu, Hongwei Zhou, and others.