In ancient times, the length of rulers in each dynasty was different, so the height of rulers was different. According to Lu Chunqiu's Musical Pieces, the ancient people in China determined the length of the ruler according to the length of musical instruments with "yellow bell" melody, so the ancient ruler was also called music ruler, rhythm ruler and yellow bell ruler. It is the basis of measurement.

Later generations had different scales. And now the size gap is different from dynasty to dynasty.

1, Shang Dynasty:

1 ft = 16.95 cm, 7 ft = 1 18.65 cm.

2. Zhou Dynasty:

1 ft = 19.9 1 cm, 7 ft = 139.37 cm.

3. During the Qin Dynasty:

1 ft = 23. 1 cm, 7 ft = 16 1.7 cm.

4. Han Shi:

1 ft = 21.35-23.75cm, 7 ft =149.45cm-166.25cm.

5. Three countries:

1 ft =24.2cm, 7 ft = 169.4cm.

6. Southern Dynasties:

1 ft = 25.8 cm, 7 ft = 180.6 cm.

7. Northern Wei Dynasty:

1 ft = 30.9 cm, 7 ft = 2 16.3 cm.

8. Sui Dynasty:

1 ft = 29.6 cm, 7 ft = 207.2 cm.

9. Tang Dynasty:

1 ft = 30.7 cm, 7 ft = 2 14.9 cm.

10, Song and Yuan Dynasties:

1 ft = 27.68 cm, 7 ft = 193.76 cm.

1 1, Ming and Qing dynasties:

1 ft = 3 1. 1 cm, 7 ft = 2 19. 1 cm.

12, Modern:

1 ft ≈33.3cm, 7 ft ≈233. 1cm.

Extended data:

The traditional units of length in China are Li, Zhang, Chi, Inch, Xun, Jie, Fu, Zhi, Yi, Bu, Chang, Ya, Yan, Ji, Rail, Luo, Millimeter, Li and Min. The basic transformation relationship is as follows:

1 ft = 10 ft; 1 ft = 10 inch; 1 inch = 10 points; 1 = 10%;

1 sheet ≈ 3.33m; 1 ft ≈3.33 decimeter; 1 inch ≈3.33 cm;

1km = 1000m； 1 meter (m) = 100 cm; 1 cm =10mm

1 Li = 150 sheets = 500m; 2 Li = 1 km (1000 m).

Baidu encyclopedia-ruler

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