Summary from OSTNT :
A remake of the popular novel Jiang Ye! One of Tang Dynasty’s ordinary soldiers, a small yet courageous boy, Ning Que, received an order to escort a carriage. He bids his farwell to Weicheng, and heads towards Chang An!

Summary of the novel:
Chang An, capital of Tang. General Xuan Wei was accused of treason because he offended Great General Xiang Hou, leading to the execution of all of his family members. Amidst the incident, a young boy named Ning Que managed to get away, dug out from a pile of corpses along with a little girl called Sang Sang. Years passed, and since that day the two of them lived together. Together with Sang Sang they both entered the military, with plausible military achievements, they were recommended into the Scholar School, which began their miraculous journey.
Is Ning Que a son of a demon, or an incarnation of a saint…