The Tanggu Truce, sometimes called the Tangku Truce (Chinese: 塘沽协定; 塘沽協定; Tánggū Xiédìng; Tanku kyōtei (塘沽協定)) was a ceasefire signed between China and Empire of Japan in Tanggu District, Tianjin on May 31, 1933, formally ending the Japanese invasion of Manchuria which had begun two years earlier.