What does it mean to sing, watch cranes dance and listen to Songtao?

Birthday language. According to the query of China Literature Network, listening to Songtao refers to the traditional knowledge of "pine cranes prolong life", and it is believed that pine trees and cranes can represent longevity. A crane stands alone, with a pine tree standing next to it, which is meaningful but lacks aesthetic feeling, so the crane dances and the pine branches surge like waves. This is very vivid, anyway, it means auspicious, and it is often used to write calligraphy or draw Chinese painting.