What should I pick up when flowers bloom under Wei Zishan and I wander alone in Meiyu Street?

Flowers bloom under Weizishan, and there should be grass behind Meiyu Street. This poem means that flowers are in full bloom under Wei Zishan, and a person wanders alone in the streets in the rainy season, while the beautiful scene of spring is described later, expressing a kind of vitality and rich fragrance of flowers in spring.