After being reported for 'rǔhuá' his account got banned.
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Internet slang and a deliberate sound-alike for 辱华 (rǔ Huá, insult China). Used to dodge automated keyword filters; the literal characters 乳滑 ('milk-slippery') mean nothing on their own.
culture
Often hurled in online controversies over foreign brands, celebrities, or films perceived to disrespect China — sometimes seriously, sometimes mockingly to lampoon overzealous accusers.