换汤不换药
huàn​tāng​bù​huàn​yào

change in name only

  1. 换 換 huàn verb
    to exchange
    to exchange; to trade; to switch; to convert currency
  2. 汤 湯 tāng
    decoction
    liquid medicinal extract or herbal tea produced by boiling Chinese medicine in water
  3. 不 bù adverb
    not
    Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings
  4. 换 換 huàn verb
    to exchange
    to exchange; to trade; to switch; to convert currency
  5. 药 藥 yào noun
    medicine
    medicine; drug; substance used to treat disease or kill pests