In 2018, He Jiankui, a Chinese Biophysicist working at SUSTech, announced that he had helped an HIV-positive father and HIV-negative mother, conceive twin daughters using IVF --- and also genetically modified the embryos using a controversial X technology to remove the CCR5 gene, and give their twin babies resistance to HIV. His actions triggered global outrage, and a Chinese court sentenced him to 3 years in prison with a fine of 500,000 yuan. Derived from a bacterial adaptive immune mechanism, the technology X was invented in 2000's, and is a technology that research scientists use to selectively modify the DNA of living organisms. It is hailed as a revolutionary tool for genetics, medicine, and biotechnology, and earned its developers a Nobel Prize in Chemistry in 2020. Id X. [1 word acronym]