In May 2015, Professor Xiao Yang authored a review on the development of CRISPR-Cas9 techniques in the journal of Military Medical Research. This review provided a valuable overview of this major scientific advance. It has been four years since the first publication of the CRISPR-Cas9 breakthrough (Science. 2012; 337: 816-21). The use of this technique has expanded into various scientific areas and is being developed into a systematic technical platform that may contribute to many bioengineering fields involving DNA sequence editing.
Keywords: CRISPR-Cas9; Ethical controversy; Genomic engineering.