What is the meaning of 大同?

Great Unity (utopian vision of the world in which everyone and everything is at peace)

significant similarities

(～卦) A combination 四上三中四下 in the Lingqijing.

green pepper

(～市) Datong (a prefecture-level city of Shanxi, China)

(～縣) Datong (a former county of Datong, Shanxi, China; modern Yunzhou District)

(～區) Datong (a district of Taipei, Taiwan)

(～區) Datong District (a district of Daqing, Heilongjiang, China)

(～鄉) Datong Township (various townships in Mainland China)

(～鄉) Datong (a mountain indigenous township in Yilan County, Taiwan)

(～鎮) Datong Town (various towns in Mainland China)

(～社區) Datong (a residential community in Zhicheng, Yidu, Yichang, Hubei, China)

the Datong era (a Chinese era name):

1. The fifth era of Emperor Wu of Liang, from 535 to 546.
2. The third era of Emperor Wuxuan of Dafengmin (formerly Nanzhao), ending in 888.
3. The third era of Emperor Taizong of Liao, in 947.
4. The second era of Puxian Wannu as emperor of Eastern Xia, from 1224 to 1233.
5. The era of Puyi as chief executive of the Japanese puppet state of the State of Manchuria (Manchukuo), from 1932 until his enthronement as emperor with the establishment of the Empire of Manchuria in 1934.

The fifth era of Emperor Wu of Liang, from 535 to 546.

The third era of Emperor Wuxuan of Dafengmin (formerly Nanzhao), ending in 888.

The third era of Emperor Taizong of Liao, in 947.

The second era of Puxian Wannu as emperor of Eastern Xia, from 1224 to 1233.

The era of Puyi as chief executive of the Japanese puppet state of the State of Manchuria (Manchukuo), from 1932 until his enthronement as emperor with the establishment of the Empire of Manchuria in 1934.

roughly the same

unity with a common goal

the Daidō era, 806-810

Datong (a city in Shaanxi, China)

Source: wiktionary.org