1. Group words: Peking Opera, Beijing, Peking Opera, Shi Jing, Beijing Erhu, Jingzu, Jingqiang, Jinghua, Jinghu, Jingyungu, Gyeonggi, Jiujing, Sanjing, Jingling, Jingque, Bianjing University, Sijing, Wujing, Luo Jing, Jingjing.

2. JΟ ng (pinyin: jοng) is a first-class standard Chinese character (commonly used character). This word first appeared in Oracle Bone Inscriptions in Shang Dynasty. Its ancient glyph is like a tall building, and its original meaning is a house built on a high place. As an adjective, it means high. Because most of them are built on highlands, "Beijing" also refers to the capital and the capital. Beijing extends from Beijing to Beijing, the capital of China, such as the Beijing-Guangzhou Line.