The Hao (Chinese: 毫; pinyin: háo) in Mandarin, or hou in Cantonese, is a traditional Chinese unit of length. One hao equals 1/10 of a li, 1/10000 of a chi, or 33+1⁄3 μm.
Contents
Present law on Chinese length units
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.
Chinese length units in engineering
These units are based on the metric system. The Chinese word for metre is 米 mǐ, which can take the Chinese standard SI prefixes (for "kilo-", "centi-", etc.). In the engineering field, traditional units are rounded up to metric units.
Compounds
絲毫 (sīháo)
一絲一毫 (yīsīyīháo)
差之毫釐，謬以千里 (chāzhīháolí, miùyǐqiānlǐ)