Emperor Xianwen of Northern Wei

On 20 June 465,[5] Emperor Wencheng died, and the 11-year-old Crown Prince Hong ascended the throne as Emperor Xianwen the next day.[6] Emperor Wencheng's wife Empress Feng was honored as empress dowager, and Emperor Xianwen's deceased mother Consort Li was posthumously honored as Empress Yuan. Power soon fell into the hands of the official Yifu Hun, who assumed dictatorial powers and killed a large number of other officials, including Yang Baoping (楊保平), Jia Airen (賈愛仁) the Duke of Pingyang, and Zhang Tiandu (張天度), Qiumuling Duohou (丘穆陵多侯), Tuoba Yu (拓拔郁) the Duke of Shunyang, and Emperor Wencheng's prime minister Buliugu Li. However, in 466, Empress Dowager Feng staged a coup and had Yifu arrested and executed. She assumed regency herself.

Empress Dowager Feng engaged Jia Xiu (賈秀), Gao Yun, and Gao Lü (高閭) as her assistants in the regency. Later, she also incorporated her brother Feng Xi (馮熙) into the decision-making circle.

Empress Dowager Feng was soon presented with a major opportunity to expand Northern Wei territory, as also in 466, rival Liu Song had a major dynastic succession struggle after Emperor Qianfei of Liu Song was assassinated in 465. Emperor Qianfei's uncle Emperor Ming of Liu Song was declared emperor in the capital Jiankang, while his brother Liu Zixun the Prince of Jin'an was declared emperor in early 466 in Xunyang (尋陽, in modern Jiujiang, Jiangxi). After Emperor Ming's forces defeated Liu Zixun's and captured and executed Liu Zixun in fall 466, the Liu Song general Xue Andu (薛安都), the governor of Xu Province (徐州, modern northern Jiangsu and northern Anhui), who had initially declared for Liu Zixun, was apprehensive that he would be punished by Emperor Ming, and so decided to surrender to Northern Wei, and soon, he was joined by Bi Zhongjing (畢眾敬) the governor of Yan Province (兗州, modern western Shandong) and Chang Zhenqi (常珍奇) the governor of Ru'nan Commandery (汝南, roughly modern Zhumadian, Henan). Empress Dowager Feng sent the general Yuchi Yuan (尉遲元) to accept the surrenders of these Liu Song generals and to secure the region just north of the Huai River, and Yuchi subsequently defeated two attempts by Emperor Ming to recapture those provinces. She also sent the general Murong Baiyao (慕容白曜) to attack and try to capture Liu Song's Qing (青州, modern central and eastern Shandong) and Ji (冀州, modern northwestern Shandong) Provinces, which were cut off from the rest of Liu Song after Xue's defection, and by 469, both provinces fell into Northern Wei hands, and all of the regions north of the Huai River were by now Northern Wei territory.

In 467, Emperor Xianwen's concubine Consort Li—a daughter of his uncle Li Hui (李惠) and therefore his cousin—bore his oldest child Tuoba Hong (different character than his own), and Empress Dowager Feng personally raised the young prince. She soon terminated her regency and returned imperial powers to Emperor Xianwen, who was 13 years old at this point.

As emperor, Emperor Xianwen was described as hardworking and appropriate in his awards and punishments—in particular, in promoting honest officials and demoting corrupt ones, and it was said that only starting in his reign were Northern Wei officials praised for being honest. He was also said to be heavily into studies of religions and philosophies, including both Taoism and Buddhism.

In 469, Emperor Xianwen created Tuoba Hong crown prince. As Tuoba Hong's mother Consort Li died the same year and was described in traditional histories to be missed by all in the palace, she was probably forced to commit suicide pursuant to Northern Wei customs.

In 470, resentful that Murong Baiyao had flattered Yifu Hun while Yifu was in power, Emperor Xianwen, in an act that appeared to be uncharacteristic for his reign, falsely accused Murong Baiyao of treason and put him and his son Murong Ruyi (慕容如意) to death.

Also in 470, an event would damage Emperor Xianwen's relationship with his stepmother Empress Dowager Feng. Empress Dowager Feng had taken the official Li Yi (李奕) as her lover. In 470, the official Li Xin (李訢), who was a close friend of Li Yi's brother Li Fu (李敷), was accused of corruption, and Emperor Xianwen became aware of the accusations even though Li Fu tried to suppress the reports. He had known about his stepmother's relationship with Li Yi and, while he had not taken any actions against it at that point, disapproved of it. He sentenced Li Xin to death, but then informed Li Xin that if he could report on crimes that Li Fu and Li Yi had committed, he would be spared. After initial reluctance, Li Xin did so, and another man named Fan Biao (范標) also did so. Emperor Xianwen then executed Li Fu and Li Yi. Empress Dowager Feng became resentful of Emperor Xianwen after that point.

In 471, because of Emperor Xianwen's philosophical interests, he wanted to leave the throne to spend more time on his studies. He wanted to pass his throne to his uncle Tuoba Zitui (拓拔子推) the Prince of Jingzhao, who was highly praised by all officials. He therefore summoned an imperial council to discuss the matter. The officials largely opposed Emperor Xianwen's proposal, and suggested instead that if Emperor Xianwen wanted to leave the throne, he should pass the throne to Crown Prince Hong. He therefore did so, and the four-year-old crown prince took the throne as Emperor Xiaowen on September 20, 471.[7] Emperor Xianwen himself took the title of Taishang Huangdi (retired emperor).