Lúhuǒ xióngxióng ránshāo, zhàoliàng le zhěnggè fángjiān.
The stove fire blazed, lighting up the entire room.
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culture
炉火纯青 is a famous idiom meaning a skill perfected to the highest degree - literally 'the furnace fire has turned pure blue/green', referencing Daoist alchemy.
