I met an old friend in another country from that poem.

From "Four Happiness Poems of Child Prodigy", the four happiness in life refer to the long drought, meeting an old friend in another country, the wedding night, and the time in "to beno. 1".

Wang Zhu's Four Happy Poems of a Prodigy was born in the late Northern Song Dynasty. Wang Zhu began to write poems when he was nine years old, and was known as a "child prodigy". Wang Zhu's poetry is brilliant. He has written many quatrains, all short poems, which are convenient for children to remember. At that time, there were more than 30 five-character quatrains, which were interpreted and compiled into the collection of Wang prodigy poems.

The book "Poems of prodigies" was compiled by later generations based on some poems by Wang Zhu and others. In fact, the poems handed down from ancient times are not all the works of young prodigies, nor are they all written by Wang Zhu alone, but have been revised and supplemented by the poems of Sui and Tang Dynasties and even the Southern and Northern Dynasties. Most titles are added separately. Poetry is a five-character quatrain, with neat meter and easy-to-understand words, which is a model for teenagers to learn poetry.

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Allusions:

According to legend, a scholar failed in the provincial examination, and it was raining lightly on his way home. When staying at a hotel at night, there were waves of suona and firecrackers in the yard next to the store. It turned out that someone in the neighboring hospital was getting married. At night, the scholar can't sleep, thinking about Wang Zhu's "four happiness" poems, and then thinking about his own situation and experience;

Eight words "four happiness" were added to the poem, which became: a drop of dew after a long drought, an old friend in a foreign land, and a creditor. Wedding night-dream, be the first-namesake. Such a change, in sharp contrast, is that the four great pleasures of life mentioned in Wang Zhu's poems have become a kind of empty joy, and the meaning of sadness is quite surprising.

References:

Baidu encyclopedia-four joys and four sorrows