What does Mulan's sculls mean in spring waves?

Rowing on the river. "Mulan" means a blue boat, "Paddle" means rowing, "Spring Wave" means a river in spring, and the whole sentence means rowing on the river in spring. Hua Yuan's poem "April Day on Earth": "April Day on Earth is the most beautiful, and cherry blossoms are like snow. In the spring wave, Mulan's sculls only envy Yuanyang, not immortals. "