"The 'Zi Ji' once said: 'Man reaches the high hill.' From tall, signifying tall. All things related to the capital come from the capital."
"The 'Customs of the Wind' states: 'The capital is not formed by human strength, but by the natural tendency of heaven and earth.' The meaning of the capital is also derived from this."
Gongyang commented: "'Capital' signifies greatness; 'instructors' means masses. The residence of the emperor must be described with words indicating greatness and multitude."
In the Military Hall, Lu Yuanwei, pointing at the map of the capital city, smiled and said: "The ancient definition of a capital city is more or less the same, referring to a large city with high buildings, high walls, and a large population."
"It can also be interpreted numerically: a billion is referred to as 'amount', ten amounts equal 'capital', once again indicating its vastness."