Definition of "Mainlander"

In Pan-ch’iao of Taiwan county, people gathered at the railway station on the morning of February 28 and began beating Mainlanders or rounding them up and assembling them in one place.

1991, Tse-han Lai, Ramon H. Myers, Wei Wou, “The Uprising”, in A Tragic Beginning: The Taiwan Uprising of February 28, 1947‎, Stanford, Cali.: Stanford University Press, page 122