What does it mean when the lingering clouds disperse into beautiful flowers and Chengjiang is as quiet as practicing?

The remaining sunset glow spread out like a beautiful brocade, and the clear river water was as calm as a white horse. The remaining clouds are scattered into a cloud, and the Chengjiang River is as quiet as practice. This is a poem from the Southern and Northern Dynasties·Xie Tiao's "Climbing Three Mountains at Night and Looking at the Capital City". The remaining clouds are the remaining sunset clouds, and the scattered clouds are like the unfolding brocade, and the Chengjiang River is clear. The river water, as quiet as practice, means as quiet as a white horse, then the afterglow disperses into Qi. Chengjiang is as quiet as practice, which means that the remaining sunset glow spreads out like a beautiful brocade. The clear river water is as calm as a white horse. practice.