Development of main idea
Focus on the development of a clear main idea in your paragraphs, including the use of topic intentions and effective organization of ideas
The geographic distribution of the Great Wall
The Great Wall extends over a vast area, covering parts of 15 provinces and autonomous regions in China
The wall's total length is estimated to be over 21000 kilometers
phases used for orientation and guiding others, including "Turn left," "Go straight ahead," and "Where is the nearest restroom?"
Entertainment and activities
It was constructed over many centers, starting in the 7th center BC
The wall has witnessed numerous historical events, including the Qin unification, the Han expansion, and the Tang revision