1. Commonly known as gold. Metal element, symbol Au, atomic number 79. It is reddish yellow, shiny, soft, with the strongest ductility, stable chemical properties, and easy to conduct heat and electricity. Commonly used as alloys, coins, decorations, etc. Known as gold.

2. metal: 5 ~.

3. money: now ~ Help students.

4. In ancient times, it refers to percussion instruments made of metal: sound ~ retreat. ~ the drums are beating.

5. Metaphor is noble and precious: ~ Words are precious.

6. Color is like gold: ~ hair (fà). ~ bright.

7. Name of dynasty (1115-1234). At the end of the Northern Song Dynasty, Akuta, the leader of the Jurchen Wanyan Department, was established in the northeast. Huining (now Acheng south of Heilongjiang) was established as its capital, and then it was moved to Zhongdu (now Beijing) and Kaifeng. 1234 perished under the joint attack of the Southern Song Dynasty and the Mongolian army.