Tā de biānjí nénglì zhēnshì diǎnshí-chéngjīn, bǎ píngdàn de wénzhāng biàn de jīngcǎi.
His editing ability is truly like turning stone to gold - he transforms bland articles into brilliant pieces.
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culture
This idiom refers to the Taoist legend of the immortal who could touch a stone and turn it to gold. It parallels the Western concept of the Midas touch or the philosopher's stone.
memory
点 (touch/point) + 石 (stone) + 成 (become) + 金 (gold) - touch stone, become gold. Alchemical and magical in imagery.