Photo taken on Dec 24, 2015 shows hoof-shaped and round gold ware unearthed from the outer coffin in the Haihunhou (Marquis of Haihun) cemetery, East China's Jiangxi province. Chinese archaeologists have found more than 20,000 pieces of relics from a 2,000-year-old tomb, which they believe belong to a marquis of the Western Han Dynasty (206 BC - 24 AD). Now they have entered the final and key phrase. (Photo: China News Service/Guo Jing)

Photo taken on Dec 24, 2015 shows hoof-shaped and round gold ware unearthed from the outer coffin in the Haihunhou (Marquis of Haihun) cemetery, East China's Jiangxi province. Chinese archaeologists have found more than 20,000 pieces of relics from a 2,000-year-old tomb, which they believe belong to a marquis of the Western Han Dynasty (206 BC - 24 AD). Now they have entered the final and key phrase. (Photo: China News Service/Guo Jing)

Photo taken on Dec 24, 2015 shows hoof-shaped and round gold ware unearthed from the outer coffin in the Haihunhou (Marquis of Haihun) cemetery, East China's Jiangxi province. Chinese archaeologists have found more than 20,000 pieces of relics from a 2,000-year-old tomb, which they believe belong to a marquis of the Western Han Dynasty (206 BC - 24 AD). Now they have entered the final and key phrase. (Photo: China News Service/Guo Jing)

Photo taken on Dec 24, 2015 shows hoof-shaped and round gold ware unearthed from the outer coffin in the Haihunhou (Marquis of Haihun) cemetery, East China's Jiangxi province. Chinese archaeologists have found more than 20,000 pieces of relics from a 2,000-year-old tomb, which they believe belong to a marquis of the Western Han Dynasty (206 BC - 24 AD). Now they have entered the final and key phrase. (Photo: China News Service/Guo Jing)

Photo taken on Dec 24, 2015 shows hoof-shaped and round gold ware unearthed from the outer coffin in the Haihunhou (Marquis of Haihun) cemetery, East China's Jiangxi province. Chinese archaeologists have found more than 20,000 pieces of relics from a 2,000-year-old tomb, which they believe belong to a marquis of the Western Han Dynasty (206 BC - 24 AD). Now they have entered the final and key phrase. (Photo: China News Service/Guo Jing)

Photo taken on Dec 24, 2015 shows hoof-shaped and round gold ware unearthed from the outer coffin in the Haihunhou (Marquis of Haihun) cemetery, East China's Jiangxi province. Chinese archaeologists have found more than 20,000 pieces of relics from a 2,000-year-old tomb, which they believe belong to a marquis of the Western Han Dynasty (206 BC - 24 AD). Now they have entered the final and key phrase. (Photo: China News Service/Guo Jing)