What does the proverb "Don't go out at sunrise, but go to Wan Li Road at sunset" mean?

Don't go out in the morning, but go to Wan Li Road at night. This is a folk proverb, which means don't go out on a cloudy day in the morning, because the weather may be bad. When it is cloudy the next night, the weather will be fine and you can travel.

Source:

Li Qing Guangting's "Xiang Yan Jie Yi" I: "Xia Zhe, red gas rises into a cloud. See you sooner or later, around spring and summer, less in autumn and winter. As the old saying goes,' Don't go out at dawn, but go to Wan Li Road at sunset.' There is another cloud:' The sun enters carmine, and there is wind but no rain.' Nine times out of ten. "

Yi:

Written by Li Guangting in Qing Dynasty, five volumes. Daoguang years into a book. It mainly records the folk customs, social customs, drama, folk art and acrobatics in Beijing and its vicinity during Jiaqing and Daoguang years. The book is divided into four parts: heaven, earth, people and things, and each part has a detailed account, which is rare in the notes of the Qing Dynasty. There is an original engraving of Daoguang for 30 years (1850).

Baidu Encyclopedia-Xiang Yi, don't go out in the morning, and go to Wan Li Road at night.