Correct

老大难

/ lǎo dà nàn /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/老大难-Chinese-idioms-Cchatty-168c5d36-edaf-473a-a687-437bb4dd84aa-1612777968.jpg

Collocation

1
老大难工厂
2
老大难问题
3
交通不畅的老大难困扰着人们
4
道路拥挤成了老大难

Definition

老大难

Literally means:

old problem

Actually means:

It means a long-pending problem that is difficult to solve. It also refers to an organization/enterprise with knotty and long-pending problems. Derogatory.

指长期存在而很难解决的问题。也指长期存在问题而无法解决的单位。具有贬义色彩。

Example

Used as subject, attributive or object. (作主语、定语、宾语)
1
Zhè
nián
dào
道路
yōng
拥挤
  
,
jiāotōng
交通
chàng
zhí
一直
shì
xiē
一些
chéngshì
城市
de
lǎonán
老大难
  

In recent years, the road is crowded, poor traffic has been a problem in some cities.

2
Liánnián
连年
kuīsǔn
亏损
de
lǎonán
老大难
zhí
一直
kùnrǎo
困扰
zhāo
zhège
这个
gōngchǎng
工厂
  
,
shǐ
使
不得不
yāoqiú
要求
zhí
辞职
  

Years of losses have plagued the factory, forced him to ask for his resignation.

3
Zhèjiā
这家
xíng
大型
gāngtiě
钢铁
企业
de
chūxiàn
出现
  
,
duì
xiē
那些
lǎonán
老大难
de
xiǎo
chǎng
yǒu
hěn
de
chōng
冲击
zuòyòng
作用
  
,
hěn
néng
可能
shǐ
迫使
men
它们
dǎo
倒闭
  

The emergence of the big steelmakers has had a big impact on the old, small factories and is likely to force them to close.

Related

老大难