Well that depends, there are several different kinds, They have the old style, still used by the die-hards (older Chinese communities) which refer to the 2/5, in Japan its the same only they have the...
Measure and mark 1½ inches from each end of each wood slat for a total of two marks on each slat. Measure 1 inch from the top dot on each slat and mark, then continue measuring and marking in 1-inch...