3. Guojiamiao tombs in Zaoyang, Hubei Province. Archeological workers have found the country's earliest man-made inkstick for writing while excavating a high-rank cemetery group dating back to about 2,500 years ago in Zaoyang, Hubei.

Several traditional Chinese musical instruments, the oldest of their kind, were also discovered. Among them was a Se, a twenty-five-stringed plucked instrument. They were unearthed in good condition at the Guojiamiao tomb group, which covers an area of 1.2 million square meters.