After Time Travel, I Used the Yi Jin Jing to Turn over the World

No system, no harem, not a brainless novel, the main plot is growth + conspiracy. Due to an accident, Chen An traveled to the Yan Empire - a world where monsters were rampant, the imperial power was declining, and the people were in dire straits. He originally wanted to live a good life with his sister here and survive. Unexpectedly, it was a dead end at the beginning. Relying on a copy of "Yi Jin Jing", can he save his sister, protect his brothers, and save the common people?