Sīmǎ Guāng xiǎoshíhou zá gāng jiù guo yí ge xiǎopéngyou.
As a boy, Sima Guang once smashed a water vat to save a friend.
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history
The 资治通鉴 covers 1,362 years, from 403 BC to AD 959. He led the opposition to 王安石's reforms, and when he became chancellor in 1086 he repealed almost all of them, dying a few months later.
culture
The vat story is in Chinese primary-school readers: when a friend fell into a big water vat and the other children ran off in panic, the young Sima Guang broke it open with a stone, and the water poured out and saved him.