GENERAL KNOWLEDGE

Detailed explanation-1: -The Great Wall safeguarded the central plain of Mainland China in history and successfully kept out invasions from various northern nomadic tribes including the Huns in the Qin and Han Dynasties, the Turks in the Sui Dynasty, the Khitan in the Song Dynasty, and the Tatar, Oirat and Jurchen in the Ming Dynasty .

Detailed explanation-2: -In 121 BC, the Han troops regained the Hexi Corridor. Thereafter, the wall was built between Lingju (today’s Yongdeng County) and Jiuquan in Gansu Province. From 111 BC to 110BC, the wall was extended from Jiuquan to Yumenguan.

Detailed explanation-3: -The Great Wall of the Han Dynasty was the longest: 10, 000 kilometers. It was built on top of the remains of the Qin Great Wall and extended westward via what is now known as the Hexi (West of the Huanghe River) Corridor to Lop Nur in the Xinjiang Uygur Autonomous Region.

Detailed explanation-4: -Arguably the greatest achievement in all of Chinese history continued during the Han dynasty-the construction of the Great Wall of China. Originally begun during the Ch’in dynasty, Wu Ti restored the wall, and continued it another 300 miles into the Gobi Desert to protect against attacks from central Asia.