True gold fears no fire; meaning that a person of integrity or a truth can withstand severe tests and criticisms. Quality or truth will always reveal itself.
尽管外界质疑声不断，他依然坚信自己的产品质量过硬，因为他深知真金不怕火来烧的道理。
Despite continuous external doubts, he remained confident in the excellent quality of his product, because he deeply understood the principle that true gold fears no fire.
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