钻坚仰高

Explanation: Yan Yuan for the original description of Confucius's praise, the latter refers to efforts to study, in-depth study and achieve very high levels. 　　Source: "The Analects Zi Han," Yan Yuan Kui Ran sighed and said, 'saith the indemnity high, drilling of the intact. '"Han Zhao Yi" non-cursive "learned leisure, Youshou in Sri Lanka, later Mu Yan, dedicated to service, drilling firm Bianco, forget the labor strike." 　　Examples: So try to be difficult after the Master has been for Humanity on, he was the first post Zonta, cover missing the heart of this small difference is positive, though ~ the blog, and anti-total power of the private for profit carry. ★ Song Xi "A Forest Retreat"