[真金不怕火炼 / 真金不怕火煉, zhēn jīn bù pà huǒ liànㄓㄣ ㄐㄧㄣ ㄅㄨˋ ㄆㄚˋ ㄏㄨㄛˇ ㄌㄧㄢˋ] true gold fears no fire (谚语 proverb); a person of integrity can stand severe tests, See Also: 谚语#112115
[炼丹八卦炉 / 煉丹八卦爐, liàn dān bā guà lúㄌㄧㄢˋ ㄉㄢ ㄅㄚ ㄍㄨㄚˋ ㄌㄨˊ] eight trigrams furnace to cook pills of immortality; symbol of the alchemist's art; Double, double toil and trouble; Fire burn, and cauldron bubble