Méng / Tián / fèng / mìng / běi / jī / Xiōng / nú / bìng / zhǔ / chí / xiū / zhù / Cháng / chéng

蒙恬奉命北击匈奴，并主持修筑长城。

Meng Tian was ordered to fight the Xiongnu in the north and oversee the construction of the Great Wall.