Correct

变天

/ biàntiān /
Strokes

Definition

to undergo change in weather/restoration of reactionary rule or the previous regime

Example

As a Verb

(of weather) change

1
Jīnwǎn
今晚
也许
yào
biàntiān
变天
  

Perhaps the weather will change this evening. / Perhaps the weather will break tonight.

As a Verb

effect an overwhelming political change (esp restore reactionary rule); stage a comeback

2
Wàngxiǎng
妄想
biàntiān
变天

dream about restoring one's rule; dream of staging a comeback