We met an old friend in another country after a long drought. The poet is Wang Zhu. Which poem is it?

From Mai's Four Poems of Rong Zhai: "Full text:" Long drought brings rain. When I meet an old friend in another country, I will spend the night in the bridal chamber when I am the first. After a long drought, I suddenly encountered a good rain. Describe the long-awaited joy of finally getting what you want. There are four happy events in life written in the poem: the first is that it rains after a long drought; The second thing is that when I was living in a foreign land, I met my old friend. The third thing is to get married; The fourth thing is to win the first place in the imperial examination, and many people think it is a happy event, such as adding more talents, moving to a new house, family reunion, harmony between husband and wife, abundant crops, abundant financial resources, seasonal celebrations and so on. Xi Rui culture is manifested in many aspects in its inheritance and development. Some people celebrate the arrival of happiness. Some people express their best wishes. In festive activities, we should pay attention to Geely, which has a "color head", an auspicious environment, and pay attention to auspiciousness in food, clothing, housing and transportation. Xi Rui culture is completely integrated into people's lives. As a custom of praying for blessings related to people's own destiny, it constantly evokes beautiful expectations in people's life, which is also an important reason why "Xi Rui" has become the most important folk auspicious symbol. The core of blessing culture is to pray for the prosperity of people and families. In ancient times, primitive ancestors worshipped reproduction for the purpose of survival and reproduction. In farming society, increasing proliferation is directly related to the prosperity of families and society, so it has become the focus of people's general attention. There are many things to pray for children's lives in life etiquette and festival activities: the custom of sending food to daughters with gourds in Jingchu area in Ming and Qing dynasties includes the concept of praying for reproduction. Marriage is the joy of harmony, and there are red dates, peanuts, longan, lotus seeds and so on. Must be placed in the bridal chamber, taking the auspicious meaning of "early birth of your son". Giving birth to a child is a major event in the family, and a woman's pregnancy is called "happiness". The joyful theme of birth and growth accompanies people's life, from "full moon" to "hundred days", through the annual "Happy Birthday" and finally "White Lost Happiness". The "longevity lock" hung around the children's necks and the "poison vest" worn on them all reflect the painstaking efforts of the elders to cherish their children and grandchildren and protect their lives.