Hebei or , (; alternately Hopeh) is a northern province of China. Hebei is China's sixth most populous province, with over 75 million people. Shijiazhuang is the capital city. The province is 96% Han Chinese, 3% Manchu, 0.8% Hui, and 0.3% Mongol. Three Mandarin dialects are spoken: Jilu Mandarin, Beijing Mandarin and Jin. Hebei borders the provinces of Shanxi to the west, Henan to the south, Shandong to the southeast, Liaoning to the northeast, and the Inner Mongolia Autonomous Region to the north. Its economy is based on agriculture and manufacturing. The province is China's premier steel producer, although the steel industry creates serious air pollution. Five UNESCO World Heritage Sites can be found in the province, the: Great Wall of China, Chengde Mountain Resort, Grand Canal, Eastern Qing tombs, and Western Qing tombs. It is also home to five National Famous Historical and Cultural Cities: Handan, Baoding, Chengde, Zhengding and Shanhaiguan. Historically, during the Spring and Autumn period and the Warring States period, the region was ruled by the Chinese Yan and Zhao states. During the Yuan dynasty, the region was called the Zhongshu Province. It was called North Zhili during the Ming dynasty, and Zhili Province during the Qing dynasty. The modern-day province of Hebei was created in 1928. Etymology Hebei Province received its name from its location in the North China Plain, north of the Yellow River. Hebei means "north of the river". Since the province is recorded in Yu Gong as Ji Province, or Jizhou, it is abbreviated as Ji (). The province's nickname is Yanzhao (), which is the collective name of the Yan and Zhao states that controlled the region during the Spring and Autumn period and the Warring States period. In 1421, the Yongle Emperor moved the capital from Nanjing to Beijing and the province started to be called North Zhili () or Zhili (), which means "Directly Ruled (by the Imperial Court)". When Nanjing became the capital of the Republic of China in 1928, the Zhili province was abolished and given its present name, Hebei. History Pre and early history Peking man, an early pre-historic Homo erectus, lived on the plains of Hebei around 200,000 to 700,000 years ago. Neolithic findings at the prehistoric Beifudi site date to 7000 and 8000 BC. Many early Chinese myths are set in the province. Fuxi, one of the Three Sovereigns and Five Emperors, is said