Later, 16 vertical bone flute was excavated in the early Neolithic site in Wuyang, Henan Province. These bone flutes are made from the bones of birds' limbs and have a history of more than 7000 years. These bone flutes are played vertically, with sound holes ranging from five holes to eight holes. Most of them are seven-tone flutes, which are the same as the flute scales that people are familiar with later. It is worth noting that these bone flutes are engraved with an equal sign next to the sound hole, and some sound holes are also punched with small holes, which are completely consistent with the later flute sounds.