The Hao () 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+1âÂÂ3 üm.
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.
These units are based on the metric system. The Chinese word for metre is mÃÂ, which can take the Chinese standard SI prefixes (for "kilo-", "centi-", etc.). In the engineering field, traditional units are rounded up to metric units.