根据第一性原理，可以计算能带，态密度，描述固体结构。-According to first principles, we can calculate the energy band, density of states, describing the solid structure.

第一性原理计算工具包，可以算各类拓扑能带结构，供大家学习(The first principle calculation tool kit can calculate all kinds of topological energy band structures for everyone to learn)