Explanation: Attack pondering. Other mountain stone, jade can be used to pondering. The more capable than the original Yu Bieguo ◇ metaphor for their effectiveness can help to correct their own shortcomings or advice. Source: "Book of Songs Xiaoya Heming" Stones from other hills, can learn. " Examples: Has been under virtual sense to ask the public, and the self-study ~. ★ Ming Hairui "Kai Bear Kiang Wu Jun door"