The relationship between China, Japan, Shandong and Baoguang in choosing a day.

Japan, China and Japan are closely related. Day after day means that the sun is just at the zenith at noon, which is the time when the sun has the strongest light and the most sunshine. Baoguang refers to the sun in the morning or evening. The sun is soft and the earth is covered with golden light, which is called Baoguang. Therefore, Lu has a close relationship with Baoguang in Japan. Shandong is the sunniest moment in Japan, and Baoguang is the softest moment. These two kinds of light are different manifestations of the sun's rays.