Substitute Marriage at the Execution Ground: Female Widows Dominate the World

As soon as her sister's head fell to the ground on the execution ground, she crawled out from the wall between the firewood shed, put on her sister's wedding dress, and married her into the Shofu Mansion for her sister - but on the wedding night, the groom was her first corpse. She is the eldest daughter of Shen Yue, a widower of Dali Temple. She has followed her father for autopsy since she was a child. The entire Shen family was slaughtered, and she was the only one who crawled out alive. No time travel, no golden fingers, pure ancient indigenous wisdom + ancestral sword making + a heart that is so restrained that it is almost cruel.