The New Biography of Zhang Liao Reborn: Vote for Cao Cao at the Beginning

The former general Ganghou Zhang Liao was named Wenyuan and was a native of Mayi, Yanmen. He first followed Ding Yuan and later returned to Dong Zhuo. Zhuo was defeated and sent his troops to Lu Bu. Taizu defeated Lu Bu. Liao surrendered all of them, worshiped General Zhonglang, and was given the title of Marquis of Guannei. When the protagonist is reborn as Zhang Liao, how can he help Boss Cao dominate the world with his system?