Are you talking about "First Love"? It seems like "but I forgot you in another dream", right? The whole poem is as follows:
"I have walked the long road to the end of the world
I can see the distant clouds and trees
How many past events are worth counting
You, where are you
I can’t forget your sad eyes
I know your silent affection
You lead me to a dream
But I forgot you in another dream
My dream and the forgotten person
The person who received my first blessing
I water the roses all day long
But the orchids wither"
This is the lyrics "First Love Girl" that Dai Wangshu used for the theme song of the 1938 movie "First Love". It is said that the orchids It refers to his first love girlfriend Shi Jiangnian (the younger sister of Shi Zhecun), while the thorny rose refers to his then-wife Mu Lijuan (the younger sister of Mu Shiying, now living in Shanghai). This song can also be found on Baidu.