2, (wind and rain reading sound), the sound is in the ear; Family affairs, state affairs and world affairs, (care about everything)

3. "Sitting alone in a hidden spring, (I play the piano and hum a song)" is a poem written by the Tang Dynasty poet Wang Wei.

4. The sentence "There is gold under a man's knee" means that only by defending (dignity) can a man not lose (morality) and his position in life will not fall.