the defence is iron-clad(sēn yán bì lěi)

the defence is iron-clad

Senyan bulwark, a Chinese idiom, Pinyin is s ē NY á Nb ì L ě I, originally referring to strict military defense, is also used to refer to clearly delimiting each other. From Xijiang moon Jinggangshan.

The origin of Idioms

Mao Zedong's "xijiangyue Jinggangshan" said: "the barrier has already been tightened, and the unity of the people has become a city." Chen Honglong's the first volume of the chronicles of the whole Tang Dynasty: "the narration and discussion of the Xingzhou river transportation are all based on the classic, which can be said to be strict and full of vitality."

Idiom usage

They are formal, predicate, object, metaphor and tight defense. Deng Yiguang's I am the sun, Part 3, Part 2: "at the beginning of resisting U.S. aggression and aiding Korea, Guan Shanlin asked to fight in Korea, but this request was not approved. Later, Guan Shanlin began to find reasons to leave the office building of the general staff's office building

Analysis of Idioms

Antonym: vulnerable

Chinese PinYin : sēn yán bì lěi