zhèng​guī HSK5

formal

正规 (正規) zhèng​guī
formal adjective
conforming to official, systematic, or authorized standards, such as in education or professional institutions

He never received a formal education and is entirely self-taught.

standard adjective
following prescribed rules, conventional patterns, or recognized technical requirements

The operations here are very formal, and every step is recorded.

Frequency

Movie subtitles
3.19 per million appears in 2% of films
Written text
15.8 per million

Details

HSK 2.0
Level 6
HSK 3.0
Level 5

Sources

Definitions
CC-CEDICT