1. Joy, cheerfulness: happiness. Happy land. Happy. I am overjoyed. It's fun. Optimism (cheerful spirit, full of confidence in the development of things) Lotte (content with one's own situation without any worries)

2. What makes people happy: having fun. Amuse.

3. Be willing to do something: never tire of it. Be kind and give.

4. Laughter: This is so funny.

5. Sound, harmonious: music. Vocal music. Music pool. Musical sound (a harmonious and pleasant sound with a certain frequency). Music songs (① music and songs; (2) songs accompanied by music). Le Zheng (the leader of the music officials in the Zhou Dynasty). Yuefu (originally the music official office of the Han Dynasty court in China, its main task was to collect folk poems and music; Later generations called this kind of folk songs or works simulated by literati "Yuefu"). 6. Last name.

7. Names: Laoting in Hebei Province and Laoling in Shandong Province.