He recounted the events of the May Thirtieth Tragedy in class.
Tips
history
On May 30, 1925, British police in Shanghai's International Settlement opened fire on Chinese protesters demonstrating against the killing of a worker, killing 13. The incident triggered nationwide strikes and boycotts and is regarded as a key trigger of the Chinese Communist movement.
memory
卅 (sà) is a single character meaning '30', formed from three 十 (ten) lashed together. 五卅 = 'five-thirty' = May 30.