Pine trees are green all year round. Confucius once said, "When the weather is cold, you will know that the pines and cypresses will wither later." This means that it is not until winter that you will know that the pine and cypress trees are the last to wither. , indicating that pines and cypresses are evergreen all year round. The pine tree is also regarded as a symbol of longevity in our country. To describe the elderly, it is said that they are like an eternal pine in Nanshan.