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// Workers AI · dad joke modeWhy Si nervous? It had a meter of anxiety.

From Wikipedia, the free encyclopedia

Si (simplified Chinese: ; traditional Chinese: ; pinyin: ) is a traditional Chinese unit of length. One si is equal to 1/10 of a hao, 1/100 000 of a chi, or 3+1⁄3 μm. In the field of engineering, one si equals 10 μm.[1][2]

Present law on Chinese length units

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Chinese measurement law in 1929, effective 1 January 1930

This law of length measurement was issued by the Chinese government in 1929, and has been effective since 1 January 1930. The base unit chi is defined to be 1/3 meter.[3][4][5]

Table of Chinese length units effective since 1930[3][4]
Pinyin Character Relative value Metric value Imperial value Notes
絲 (T) or 丝 (S) 1100 000 3+13 μm 0.000131 in
háo 110 000 33+13 μm 0.00131 in Chinese mil
(T) or (S) 11000 13 mm 0.0131 in Chinese calibre
fēn 市分 1100 3+13 mm 0.1312 in Chinese line
cùn 市寸 110 3+13 cm 1.312 in Chinese inch
chǐ 市尺 1 33+13 cm 13.12 in Chinese foot
zhàng 市丈 10 3+13 m 3.645 yd Chinese yard
yǐn 100 33+13 m 36.45 yd Chinese chain
市里 1500 500 m 546.8 yd Chinese mile.

Metric length units

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These units are based on the metric system. The Chinese word for metre is , which can take the Chinese standard SI prefixes (for "kilo-", "centi-", etc.). In the engineering field, traditional units are rounded up to metric units.[6][7]

Table of Chinese length units in engineering
Pinyin Character Relative value Metric value Imperial value Notes
110000001 μm Authorized name: 微米
(T) or (S)110000010 μm Authorized name: 忽米
háo 110000100 μm Authorized name: 絲米 (T) or 丝米 (S)
(T) or (S)110001 mm Authorized name: 毫米
fēn 公分110010 mm Authorized name: 釐米(T) or 厘米(S)
cùn 公寸110100 mm Authorized name: 分米
chǐ 公尺11 m Authorized name:
Zhàng 公丈1010 m Authorized name: 十米
yǐn 公引100100 m Authorized name: 百米
公里10001000 m this li is not the small li above,
which has a different character and tone

Compounds

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See also

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References

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  1. Language Institute, Chinese Academy of Social Sciences (2020). 新华字典 (Xinhua Dictionary) (in Chinese) (12th ed.). Beijing: The Commercial Press. pp. 458, 696. ISBN 978-7-100-17093-2.
  2. https://en.wiktionary.org/wiki/絲
  3. 1 2 "The Weights and Measures Act (1929)". Legislative Yuan. Archived from the original on 2014-04-25.
  4. 1 2 Language Institute, Chinese Academy of Social Sciences (2016). 現代漢語詞典 (Contemporary Chinese Dictionary) (in Chinese) (7th ed.). Beijing: Commercial Press. pp. 1235, 1789. ISBN 978-7-100-12450-8.
  5. 《中华人民共和国国务院公报》1959年第16号(总号:180)第316页《統一公制計量單位中文名称方案》("Gazette of the State Council of the People's Republic of China" No. 16, 1959 (Total No.: 180) p. 316 "Proposal for Unifying the Chinese Names of Metric Measurement Units" )
  6. (in Chinese) 1981 Gazette of the State Council of the People's Republic of China Archived 2012-01-11 at the Wayback Machine, No. 365 Archived 2014-11-04 at the Wayback Machine, page 575, Table 7: SI prefixes
  7. "法定度量衡單位及前綴詞" (PDF). bsmi.gov.tw. 31 October 2023. Archived from the original (PDF) on 13 January 2024.
  8. "《重編國語辭典修訂本》臺灣學術網路第六版 ("Revised Edition of the Chinese Dictionary" Taiwan Academic Network Sixth Edition)". 中華民國教育部 (Ministry of Education of the Republic of China).