The article "Data driving design of high-entropy alloys for lightweight and dynamic applications" by Kaixuan Cui, Junwei Qiao, Peter K. Liaw, and Yong Zhang, published in *Science China-Phys. Mech. Astron.* (2024), explores the design and properties of high-entropy alloys (HEAs) for lightweight and dynamic applications. HEAs, which are solid solutions without a dominant solvent element, have expanded the composition space and allowed for the creation of unique micro- and nano-level structures. The relationship between phase formation and alloy parameters is complex, but data-driven approaches can help screen specific HEAs. The study discusses phase-formation rules, including atomic-size differences, enthalpy and entropy of mixing, and electronegativity differences, which influence the stability and properties of HEAs. Parameters such as $\Omega$ and geometric parameters are introduced to predict solid-solution phase formation and disordered solid solutions. The research aims to meet the demands for lightweight materials in aerospace applications.The article "Data driving design of high-entropy alloys for lightweight and dynamic applications" by Kaixuan Cui, Junwei Qiao, Peter K. Liaw, and Yong Zhang, published in *Science China-Phys. Mech. Astron.* (2024), explores the design and properties of high-entropy alloys (HEAs) for lightweight and dynamic applications. HEAs, which are solid solutions without a dominant solvent element, have expanded the composition space and allowed for the creation of unique micro- and nano-level structures. The relationship between phase formation and alloy parameters is complex, but data-driven approaches can help screen specific HEAs. The study discusses phase-formation rules, including atomic-size differences, enthalpy and entropy of mixing, and electronegativity differences, which influence the stability and properties of HEAs. Parameters such as $\Omega$ and geometric parameters are introduced to predict solid-solution phase formation and disordered solid solutions. The research aims to meet the demands for lightweight materials in aerospace applications.