What's the name of this poem? Who can tell me?

This is Li Shangyin's Untitled Tang Dynasty, and the following is poetry. Take a look:

Translation 1

How difficult it is to get together, and it is even harder to leave;

Farewell in late spring is like the east wind withering.

Spring silkworms spit silk until they die;

The red candle set itself on fire, and the tears dried up.

Make up in front of the mirror in the morning, lest you change color like a cloud;

It's sad to sing to the moon at midnight.

Penglai Wonderland is not far from here.

Careful bluebird messenger, please visit me.

Translation 2

It's rare to have a chance to meet each other, but I can't bear to part with each other. In addition, the weather in late spring, the east wind is coming, which makes people even more sad. Spring silkworms don't spin silk when they die, candles burn to ashes, and tear-like wax oil can drip dry. Women who dress up in front of the mirror in the morning are only worried that the plump bangs will change color and the youthful appearance will disappear. Men can't sleep at night, so they must feel Leng Yue's aggression. The other person's residence is not far from Penglai Mountain, but there is no road to cross, just out of my reach. I hope there will be a messenger like a bluebird to visit my lover and diligently deliver the message for me.

Notes on the title or background of a book.

As far as poetry is concerned, this is a love poem that expresses two of a kind's untiring death. However, it has always been believed that there may be implicit trust in personnel relations. Starting with the word "difficult", it is pointed out that it is not easy to get together and it is even harder to leave. Delicate feelings, rich and colorful language, extraordinary pen. Couplets compare spring silkworms to crimson wax, which is very wonderful, painful and firm. Then the neckline writes Xiao makeup in front of the mirror, caresses the temples and hurts itself, and counts itself; It's a trick to sing in the dark and Leng Yue covers himself. Persuade yourself to cherish, be kind and cherish, but be bitter and considerate, which can be described as a thousand turns and a gentle face. Finally, I wrote a letter hoping that the messenger would spread good news frequently, which means graceful singing, bright future, and really a beautiful place. A few words of spring silkworm are excellent for thousands of years.