Taiwanese coins are dated from the end of the Chinese Empire era (1911).
Dates are read from right to left.

Example 1:

Numerals (from R to L) = 7 x 10 + 8 = 78.
Date = 78 + 1911 = 1989 AD.

Example 2:

Numerals (from R to L) = 9 x 10 = 90.
Date = 90 + 1911 = 2001 AD.