What words stand for great maintenance technology?

Perfect-pure: pure. Taoist alchemists believe that it is successful to make a pure blue flame in the furnace. Later, it was used to describe the perfection of kung fu.

From: Don Sun Simiao's Four-character Poems: "Lu Honghuo, He; The smoke is awkward and the flame is not fake. "

Ex.: Now it's ~ climate, and it's time for brothers to show their talents.

◎ Zeng Qingpu's "Evil Sea Flowers" back to the 25th.

Grammar: subject-predicate type; As predicate, attribute and adverbial; Of learning, technology, etc.

Synonym: fluent and familiar.

Antonym: becoming a monk halfway