Jicheng is a word from the Chinese language that means "capital city." Beijing is a city in China that is often called Jicheng.
So when people say "Jicheng Beijing," they are referring to the capital city of China, which is Beijing. It's kind of like when you say "Big Apple" to mean "New York City" or "Windy City" to mean "Chicago."
In Jicheng Beijing, there are many important and interesting things to see and do. You can visit the Forbidden City, where emperors used to live, or the Great Wall of China, which is a very long wall that was built a long time ago to protect the country from enemies.
There are also lots of delicious foods to try, like Peking duck (a special way of cooking duck that is very famous in Beijing) and dumplings (little pockets of dough filled with yummy stuff like meat or vegetables).
Jicheng Beijing is a very big and exciting place to visit, but you have to be careful when walking around because there are lots of people and cars. It's also important to be respectful of the culture and customs of the people who live there. But overall, Jicheng Beijing is a great place to explore and learn about China!