What does Mu Xiangyang mean by spring hair?

Fortune-telling poem: spring wood is sunny, three shades are rooted, and the woodcutter doesn't know, so it is cut into firewood.

Fortune-telling: Heroes and heroes, it's easy to get past every time they eat people. Useless people, people who hold this charm will be trapped by dragons and bullied by flies. Once the clouds start to rain, their heads will be held high and the truth will be revealed. There are also signs of temporary flexion and extension. This sign of fortune-telling indicates that opportunities will often come and lurk in the dark, but people with insufficient common sense will miss the opportunity.