Complex sentence: Note that ISO 3166-2:TW does not contain Kinmen County and Lienchiang County-which also under the jurisdiction of the Fukien Province of the Republic of China-because they are not considered as a part of Taiwan historically.
Split into simpler sentences: Note that ISO 3166-2:TW does not contain Kinmen County and Lienchiang County which also under the jurisdiction of the Fukien Province of the Republic of China. Because they are not considered as a part of Taiwan historically.