The ping and tsubo are its equivalent Taiwanese and Japanese units, similarly based on a square bu (ja:步) or ken, equivalent to 36 square Chinese or Japanese feet.
[3] Informal use continues, however, including in the form of real estate use of unusual fractions of meters equivalent to unit amounts of pyeong.
Real estate listings on major websites such as Daum show measurements in square meters with the pyeong equivalent.
In China, the metrication of traditional units would produce a ping of 4 m2, but it is almost unknown, with most real estate floorspace simply reckoned in square meters.
The longer length of the Hong Kong foot produces a larger ping of almost 5 m2, but it is similarly uncommon.