It means: in April, all the flowers on the earth withered, and the peach blossoms in Dalin Temple on the mountain just began to bloom. That is, when tourists are looking for spring, the spring on the mountain has not disappeared, but has just arrived.
The scientific truth is that the temperature in high altitude areas is lower than that in low altitude areas because of the difference in altitude, so peach blossoms bloom late. I hope you are satisfied.