jibèI sēn yán

Explanation: Caution; Preparation: prevention. The security is extremely tight.

Source "Mandarin Jinsan": "Be wary of studying for the Japanese exam."

Structural subject-predicate form.

Usage is used to describe a well-defended language. Generally used as predicate, object and attribute.

Shape recognition; Can't write "time"

Synonyms are tightly guarded and impeccable.

The antonym is fragile and fragile.

On the eve of Beijing's liberation; Military police and gendarmes guarding the city; Armed with live ammunition; ~;