2. Describe yourself as knowledgeable.
3. It is well known: it is well known.
4. Ancient music: It turns out that Zhou is interested in music.
5. Later, it generally refers to people who understand music and opera.
6. weekly poverty alleviation: provide help to widows, lonely old people and other poor people.
7. Travel around the world: Travel around the world: Go all the way and travel all over the world.
8. At first, Kong Qiu took his students around many countries at that time, hoping to be reused to promote Confucian political thoughts. Later, he traveled all over the country.
9. Duke Zhou vomited and fed again: it was later used as a code name for the incumbent.