換湯不換藥

different broth but the same old medicine (idiom); a change in name only / a change in form but not in substance

to exchange / to change (clothes etc) / to substitute / to switch / to convert (currency)

surname Tang

rushing current

soup / hot or boiling water / decoction of medicinal herbs / water in which sth has been boiled

no; not so / (bound form) not; un-

medicine / drug / substance used for a specific purpose (e.g. poisoning, explosion, fermenting) / CL:種|种[zhong3],服[fu4],味[wei4] / to poison