炉火纯青

炉火纯青 [lú huǒ chún qīng]

1. ■ The stove fire is pure green -- perfection in one's studies.; come to a head; got exactly the results desired; high degree of professional proficiency; make a masterly application of ...; master one's skill to perfection; attain perfection; pure blue flame -- a high degree of technical or professional proficiency; reach high perfection; exquisite in skill; (One's ideas) reaching absolute clarity and purity:

他画山水的技巧达到了炉火纯青的地步。 He attained perfection in landscape painting.