壁垒一新 bì lěi yī xīn

DEFINITIONS

  1. to have one's defenses in good order (idiom)

CHARACTERS

壁 bì
HSK 5
partition wall; walls of a house
垒 lěi rampart, military wall
一 yī
HSK 1
one; a, an; alone
新 xīn
HSK 2
new, recent, fresh, modern