 Today, the rule for converting the two major units from two different sources is

Officially, land area is measured in hectares and square kilometers.Volume measure in Taiwan is largely metric, with common units such as liter and milliliter.Packaged goods in Taiwan largely use metric measurements but bulk foodstuffs sold in wet markets and supermarkets are typically measured with units derived from traditional Japanese units of mass, which are similar but not equivalent to corresponding Chinese units of mass.