The entire Sang family is exiled to the Hundred Thousand Mountains, where death seems inevitable. But Sang Sang declares that no matter how deep the mountains are, they cannot trap people who know how to make a living. She comes up with plans for the whole family: clearing land and planting rice, harvesting thirty mu of wheat until the stalks bend under its weight, mining the mountains for ore, and trading medicinal herbs for grain. Together, they transform a barren mountain valley into a thriving city with a thousand households and countless lights, attracting five neighboring strongholds to join them. Around the bonfire one night, the family takes stock: enough grain to last two years and enough iron ore to arm three hundred people.