MEGA X is a cross-platform desktop software for Molecular Evolutionary Genetics Analysis, providing a graphical interface for conducting molecular evolutionary genetics analysis. Its main functions include: multiple sequence alignment, evolutionary distance calculation, phylogenetic tree construction (supporting methods such as neighbor-joining, maximum likelihood, and maximum parsimony), molecular clock testing, and selection pressure analysis, etc. MEGA X, with its intuitive graphical interface and comprehensive functions, has become a commonly used tool for beginners and researchers in phylogenetic analysis.