How long was the ancient blade?

In ancient times, it was about 1.7 meters.

Eight feet a week equals one cut; Seven feet is an incision in Chinese. The length units of the Zhou Dynasty are: ruler, ruler, inch and minute. Where: 1 ft = 1 ft, 1 ft = 10 inch, 1 0 minute (1ft =19. A piece is eight feet, which is 1.6 meters. The length units in Han Dynasty are: lead, vertical, ruler, inch and minute. Where: 1 Pb = 10 ft, 1 ft, 1 ft = 10 in, 1 in = 10 min (1 ft

Judging from the figures above, what is the distance between the two yards? Actually, it's a wide range. Because different dynasties have different definitions of the same length unit, it is actually difficult to say clearly. In history, "seven-foot man" is often written as "eight-foot man" and above seven feet to describe others' height; Eight feet is the same, so it may be circumstantial evidence. One inch is about the height of an adult, which is about 1.7 meters.