Your elder sister is Korean and married Taiwanese husband. That is your brother in law. You two are similar. How many children do your parents give birth to. Only you and your elder sister. You don't have an elder brother or young sister. So your nationality is Korean. You are looking for your woman from Korea too. Does your brother in law speak Korean. Not Chinese. Taiwan language still has dialects. Taiwanese 臺語 is our official language. Not Chinese. Chinese is studied at school. Most Taiwanese are brainwashed by Ma馬Ying英 jong 九. They are not real Taiwanese. There are many Taiwanese living in the countryside. 鄉下來的 from COUNTRYSIDE. Not from the city.