His arrows are unparalleled, and he once killed two birds with one stone, shocking the grassland;
He was as resourceful as the abyss and went on missions alone, causing the powerful Turks to fall apart;
He taught his son well, and his son ranked first among the twenty-four heroes of Lingyan Pavilion;
He had a keen eye for talents, and his son-in-law was Emperor Taizong of the Tang Dynasty who created the Zhenguan era;
With his strategy of vertical and horizontal control, he defeated an army of hundreds of thousands and held up a frontier of thousands of miles in the Sui Dynasty;
He is Chang Sun Sheng, who can be called the "invisible Great Wall" of the Sui Dynasty.
