Late one night.
A flying saucer from an unknown planet comes to the Forbidden City, and it emits an inorganic cold tone:
——Dear people of the Earth, I would like to send my sincere greetings to you on behalf of the Mcullen Planet.... We are very sorry for destroying the Earth within three hours, and the countdown begins now.
What Wang Xiaobai has to do is to save the earth within three hours.
Conception: