The name comes from the idiom: the famous rain curtain and cloud floor in history.
Rain: rain, water falling from the clouds to the ground.
"Shuo Wen Jie Zi" explains the cloud: Water comes out from under the cloud. As the sky is like a cloud, water is idle. All rain belongs to rain.
Chuan: The main meaning of Chuanzi is teaching, and it also has the meanings of propaganda, dissemination, communication, transmission, expression and revelation.
Explanations in Shuo Wen Jie Zi: Ye Qi. Judging from this man's voice.
The meaning of the name can be interpreted as: "Swift? Go ahead. "