city of strong fortification
It's a metaphor for a city that defends solidly and is not easy to break.
Idioms and allusions
[source]: Chen Shou's biography of Xinpi in the annals of the Three Kingdoms, Wei annals, said: "the art of war says that those who have Shicheng Tangchi with one million armor but no millet can't defend it."
Discrimination of words
We have shichengtangchi, the enemy can't pass.
Chinese PinYin : shí chéng tāng chí
city of strong fortification
flowers blooming like a piece of brocade. fán huā sì jǐn
humble followers waiting for a pull from their superior. huái nán jī quǎn