铜墙铁壁

Chinese

For pronunciation and definitions of 铜墙铁壁 – see 銅牆鐵壁 (“impregnable and indestructible wall or barrier; something very firm and indestructible”). (This term is the simplified form of 銅牆鐵壁).

Notes: Simplified Chinese is mainly used in Mainland China, Malaysia, and Singapore. Traditional Chinese is mainly used in Hong Kong, Macau, and Taiwan.