When there is only one word "no" or the word immediately after the word "no" is not the fourth tone, the pronunciation is four tones. For example, those who don't obey the law. But if the words behind are also four tones, they need to be tone-sandhi and become bú. For example: no (bú) yes; Wrong.
Extended data
"Live up to Youth" comes from Haizi's famous sentence "Dreams are Horses". Horses mean strength and hope here. Take the horse, a strong and beautiful animal, as the carrier of hope, bearing inner thoughts and dreams, and providing internal support for future life.
Haizi (1964- 1989), formerly known as Cha Haisheng, is a contemporary young poet from Chawan Village, Gaohe Town, Huaining County, Anhui Province. From 1984' s "Asian Copper" to 1989' s last poem "Spring, Ten Haizi", he created nearly 2 million words of poems, plays, novels, papers and notes. Famous works include Asian Copper, Wheat Field, Dream as a Horse, Poetry for the Daughter of Night, etc.
Haizi's poetic world is very complicated, and his poetic thought is a synthesis of ancient epic, modern lyric poetry, romantic poetry and modernist poetry. Ideologically, he is close to an existentialist; Emotionally, he is close to a romantic; Mentally, he is close to a "madman" prophet; From the cognitive way, he is also an idealist full of divine experience.
References:
Baidu encyclopedia-Haizi