Correct

换汤不换药

/ huàn tāng bù huàn yào / 
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/换汤不换药-Chinese-idioms-Cchatty-67f3b4e9-8447-4762-afb1-0c5ab3885393-1612777325.jpg

Collocation

1
只能
2
还是换汤不换药
3
只是换汤不换药
4
换汤不换药的产品
5
源:换汤不换药的行为

Definition

换汤不换药

Literally means:

change the liquid but not the drug

Actually means:

offer the same old stuff but with a different label

汤 refers to hot water.

The phrase means changing only the form but not the content or nature. Often derogatory.

汤,热水。

换汤不换药,比喻只改变形式,没有改变内容或实质。具有贬义色彩。

Example

Used as predicate, object or attributive. (作谓语、宾语、定语)
1
Guòqù
过去
jiào
叫
xuéyuàn
学院
  
,
xiànzài
现在
jiào
叫
dàxué
大学
  
,
míngchēng
名称
bùtóng
不同
  
,
shuǐpíng
水平
yījiù
依旧
  
,
sìhū
似乎
huàntāngbùhuànyào
换汤不换药
  
。

In the past called "college", now called "university", the name is different, the level is still the same, it seems that the does not change medicine.

2
Tāmen
他们
gōngsī
公司
de
的
gǎigé
改革
  
,
lòng
弄
lái
来
lòng
弄
qù
去
dōu
都
shì
是
huàntāngbùhuànyào
换汤不换药
  
,
bìng
并
méiyǒu
没有
qǔdé
取得
shíjì
实际
de
的
xiàoguǒ
效果
  
。

Their company's reform, to get around are soup not change medicine, and did not achieve practical results.

3
Zhè
这
kuǎn
款
xīn
新
jīqì
机器
  
,
wàiguān
外观
shì
是
gǎi
改
le
了
  
,
xìngnéng
性能
què
却
sīháo
丝毫
bù
不
biàn
变
  
,
shì
是
huàntāngbùhuànyào
换汤不换药
de
的
chǎnpǐn
产品
  
,
suǒyǐ
所以
xīyǐn
吸引
bù
不
le
了
duōshǎo
多少
gùkè
顾客
  
。

This new machine, the appearance is changed, performance is unchanged, is the soup does not change the product, so can not attract many customers.