The Famous Crossbow of Mai Ha is a 1481 years old piece made by Mai Ha, a atilliator living in Beijing.
Considering its age and the quality of the work, people consider it of high value.
It is engraved with asian patterns and some symbols pertaining to Hinduism.
This piece doesn't exist, but as a legend. It is said that in the year 531, Mai Ha, the owner, made use of it in Beijing to empower the Ha family. Now it is lost, or broken, we will never know.