Hualien County is a county on the east coast of Taiwan. It is Taiwan's largest county by area, yet due to its mountainous terrain, has one of the lowest populations in the country. The county seat and largest city is Hualien City. Hualien County is located in the eastern part of Taiwan; the Pacific Ocean is to its east and the Central Mountain Range is to its west. Hualien is the largest county in Taiwan in terms of area, with a long, narrow and mountainous terrain.

Taichung, officially Taichung City, is a special municipality located in central Taiwan. Taichung is the second largest city of Taiwan, with more than 2.85 million residents, making it the largest city in Central Taiwan. It serves as the core of the Taichung–Changhua metropolitan area, the second largest metropolitan area in Taiwan.