The Tang Dynasty and Song dynasties were crescents in the middle of the mountain, the Han tombs were on the top of the mountain, and the Shang and Zhou dynasties were on both sides of the river. This means that the tomb topography was different in each period.
The original sentence is: The Tang Dynasty is halfway up the mountain, the Song Dynasty is crescent, the Han Dynasty tombs are on the top of the mountain, the Shang and Zhou dynasties are on both sides of the river, the Spring and Autumn Period and the Warring States Period are buried on the top of the mountain, and the Qin and Han Dynasty tombs are buried in the mountains. In the Eastern Han Dynasty and Southern Dynasties, the hillside was chosen, while in the Sui, Tang and Song Dynasties corpses were placed on the lower slopes.
This means that most of the large tombs in the Spring and Autumn Period, the Warring States Period and the early Western Han Dynasty were buried at the highest point of the mountain, or near the top of the mountain. Large tombs in the middle and late Western Han Dynasty tend to be buried on ridges, and the terrain is lower than that of pre-Qin tombs. Most of the tombs from the Eastern Han Dynasty to the Wei, Jin, Southern and Northern Dynasties were dug halfway up the mountain. Tombs from the Sui Dynasty, Tang Dynasty to Song Dynasty are generally buried under the mountainside slopes.
These sentences also reflect the development and progress of Feng Shui theory. During the Shang Dynasty and the Spring and Autumn Period and the Warring States Period, the Feng Shui theory was not perfect. Many nobles mistakenly believed that the location of the top of the mountain, like the altar in the middle, could control everything, so they chose the cemetery on the top of the hill.
This is actually a burial by riding a dragon, which does not conform to Feng Shui theory. During the Qin and Han Dynasties, people learned from experience and lessons, and mostly buried cemeteries on hillsides or mountains. This was called dragon burial, which was an improvement over the Spring and Autumn Period. The Feng Shui classic "Fox Head Sutra" may have come from the Qin and Han Dynasties.
The Feng Shui theory was more perfect during the Tang Dynasty. Feng Shui believes that the real Feng Shui cemetery may be at the foot of the slope, where the four mountains come together, where vitality gathers, and where the mountains and rivers meet. Later Tang Dynasty cemeteries, Ming Dynasty cemeteries, Qing Dynasty cemeteries, especially imperial tombs all relied on this theory to select their sites, so it is more reliable to rely on this rule to find the location of large cemeteries.