Photo taken on May 23, 2020 shows glazed ceramics unearthed from ancient tombs discovered on the bank of the Yellow River, in central China's Henan Province. Archaeologists have found more than 600 ancient tombs on the bank of the Yellow River, and dug up over 2,000 burial items, local authorities said. (Photos: Xinhua)

Photo taken on May 22, 2020 shows a bronze seal unearthed from an ancient tomb discovered on the bank of the Yellow River, in central China's Henan Province. Archaeologists have found more than 600 ancient tombs on the bank of the Yellow River, and dug up over 2,000 burial items, local authorities said.

Photo taken on May 23, 2020 shows glazed ceramics unearthed from ancient tombs discovered on the bank of the Yellow River, in central China's Henan Province. Archaeologists have found more than 600 ancient tombs on the bank of the Yellow River, and dug up over 2,000 burial items, local authorities said.

Photo taken on May 22, 2020 shows bronze caps for writing brushes unearthed from ancient tombs discovered on the bank of the Yellow River, in central China's Henan Province. Archaeologists have found more than 600 ancient tombs on the bank of the Yellow River, and dug up over 2,000 burial items, local authorities said.

Photo taken on May 23, 2020 shows a bronze ware unearthed from an ancient tomb discovered on the bank of the Yellow River, in central China's Henan Province. Archaeologists have found more than 600 ancient tombs on the bank of the Yellow River, and dug up over 2,000 burial items, local authorities said.