Its name was derived from fire flakes of six colors (red, yellow, green, blue, dark blue and purple or yellowish brown) emitted when firing stone ball at a high angle by dint of gunpowder.

It was also called Roedung mortar as its firing sounded thundering, accompanying a big flash.

The mortar consists of muzzle and powder chamber and was easy to carry and handle.

It had been mass-produced in 1032 and from 1122 to 1127 to be sited at all strongholds across the country.

According to a historical record, it was called Chongthong mortar during the Feudal Joson Dynasty (1392-1910).

It was cast in copper in the period of Koryo (918-1392) and in iron during the Feudal Joson Dynasty.