Introduction to popular science content: From Faraday's discovery of the principle of electromagnetic induction in 1831, Edison's invention of the electric light in 1879, to the widespread application of modern electricity; from the earliest electric lights in Cixi's palace in China to the Three Gorges Project and famous power plants at home and abroad; From the lives of famous scientists to various power generation principles, the knowledge review covers everything. Walking all the way in, you feel like you have walked through more than a hundred years of people's understanding and use of electricity.