Zhè zhāng hǎibào yīn yǒushāng-fēnghuà bèi shāngchǎng chèxià le.
The poster was taken down by the mall for being indecent.
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有伤风化 is a formal/legal-ish phrase meaning 'damaging to public morals' (风化 = mores/decency). It's most often used to condemn obscene content or improper conduct between men and women.
