総理各国事務衙門
As the longstanding leader of the Zongli Yamen, which he established in 1861, Prince Gong was responsible for spearheading various reforms in the early stages of the Self-Strengthening Movement, a series of measures and policy changes implemented by the Qing government with the aim of modernising China. He also founded the Tongwen Guan in 1862 for Chinese scholars to study technology and foreign languages.