One jun = 24kg (thirty catties in ancient times, sixteen taels per catty,)

The power of one elephant = ten tons (one arm of Cunxiao has [25,000 catties of power], and two arms have [four elephants but the bravery].) ――――From Luo Guanzhong's "Romance of the Five Dynasties of the Remnant Tang Dynasty" Chapter 32)

One hour = two hours

One cup of tea = ten minutes

One stick of incense = five minutes

One breath = 3 seconds (this depends on the author's definition, some authors use this instead of the unit of seconds)

One blink = 0.02 seconds

10 m/s = 36 km/h

30 m/s = 108 km/h

Mach 1 is about 340 m/s, or 1224 km/h, and the speed of sound varies depending on the environment