Lin Xiao used the system and disguised herself as a "lazy girl" to gradually transform the poor family into a "five-good family" and build a poor village into a "national model village", starting from improving the family style. She secretly pushed her family and villagers to contribute to the country's development in various fields - the security trained by the eldest brother was exported overseas, the second brother's company overcame technical difficulties, and the younger sister's scientific research results benefited people's livelihood... The rewards also upgraded: from high-yield seeds to cutting-edge technology, from village-level infrastructure to national-level project support. Finally, when the whole family stood at the "National Contribution Award" award ceremony, they suddenly realized that the little daughter who was once considered "promising" had already led them and the motherland to glory in her unique way. This is a refreshing article about the seamless connection between family transformation, rural revitalization and rejuvenating the country through science and technology.