Introduction to Pine and Birch Love: On the grassland spread out like a carpet on the western slope of Changbai Mountain, you can often see the moving scene of pine and birch trees depending on each other. The pine tree is tall and straight, solemn and solemn, like a masculine man; the birch tree has its branches and leaves spread out and its body is graceful, like a soft and pretty woman. They are like a pair of lovers meeting in Changbai Mountain, or holding a grand collective wedding, forming a rare landscape.