William has abbreviated a little. In 10 equal, a gai MINOR second (e.g. from D to E
) should be equal to a gao MAJOR second (e.g. from D to E
). In medium precision JI or near-just tunings, this could be equating something like 13:12 with something like 35:32.
Things get tricky if we abbreviate major and minor in some contexts, sometimes you can skip major and minor and just leave the accidental name (as in pai [minor] second, pao [major] third, etc), but not always, as sometimes it leads to confusion, as above.
10EDO could be
P1, gai 1/gai m2/gao M2, M2/m3, gai m3/gao M3, M3/p4, gai 4/gao 5, P5, gai m6/gao M6, M6/m7, gai m7/gao M7/gao 8, P8.