十月四日懸案

On 18 September 1931, the Japanese army blew up the tracks of a Japanese-owned railway in south Manchuria. The explosion failed to derail (使…脫軌) an express train, so the Japanese killed the Chinese railway guards and fabricated a story that the Chinese had sabotaged (蓄意破壞) the railway.

Chan, S.J. (2014). East River Column -- Hong Kong Guerrillas in the Second World War and After. Hong Kong: Hong Kong University Press.