But many people use the ROC passport when they enter--so they needn't apply for a visa--and then ask the customs officials to stamp their other passport when they leave.
但很多人持中華民國民護照返台（可以免簽證），出境時，卻會要求海關人員在他的外國護照上蓋章，證明他是以外國人身分到台灣的。