初生之犊

Explanation: Newborn calf, or the brave young people simply analogy 　　Usage: Partial official; as object; with compliment 　　Source: Qin Zhuang, "Chuang Tzu to know the North Tour": "Germany and the United States for Ru, Ru Road will be home, Yu Yan as freshmen calf pupil without seeking its so!" 　　Examples: ~ The courage to stand in the forefront of all battles. ★ Xia Yan, "Theater war three years"