(This book won the 4th Realistic Essay Competition Excellence Award) Electricity has become an indispensable factor in people's lives. After graduating from university, Wen Xiaonuan voluntarily gave up her job in urban government agencies and came to a township power supply station with harsh conditions to apply to become the only female electrician. Faced with the incomprehension of her colleagues and the difficulties of her customers, Wen Xiaonuan overcame many difficulties and carried out emergency power supply repairs in the early morning and night in the storm, high temperature and heat, and provided Thousands of households send bright lights and carry out live work at the same time, from low voltage 0.4 KV to medium voltage 10 kV, then to high voltage 110, 220, ultra-high voltage 500, and ultra-high voltage 1,000 kV. Dancing with electricity at different voltage levels, they gradually grow into guardians of light that protect the lights of thousands of households. At the same time, through electric energy substitution, drone escort and other methods, they help hometowns embark on the road to electricity prosperity and realize the dream of rural revitalization. I would like to dedicate this book to the thousands of front-line power workers who have made silent contributions in the new era.