This is a manifestation of peach trees adapting to cold air. Just after the cold winter, peach trees themselves are short of water. Because of the arrival of warm spring, flowers bloom first and then grow leaves, which is beneficial to the growth of flowers, and there will be no water shortage and flower falling caused by leaves such as photosynthesis.
At the same time, open leaves will attract insects and affect the growth and pollination of flowers.
Generally speaking, peach trees bloom first and then grow leaves, which is the performance of adapting to weather and natural enemies, adapting to nature and the result of natural competition-survival of the fittest.