[国耻 / 國恥, guó chǐㄍㄨㄛˊ ㄔˇ] national humiliation, refers to Japanese incursions into China in the 1930s and 40s, and more especially to Mukden railway incident of 18th September 1931 九一八事變|九一八事变 and subsequent Japanese annexation of Manchuria, See Also: 九一八事變, 九一八事变#31066
[勿忘国耻 / 勿忘國恥, wù wàng guó chǐㄨˋ ㄨㄤˋ ㄍㄨㄛˊ ㄔˇ] Never forget national humiliation, refers to Mukden railway incident of 18th September 1931 九一八事變|九一八事变 and subsequent Japanese annexation of Manchuria, See Also: 九一八事變, 九一八事变