1. Take bus 108 and 201 to and from Taichung Railway Station and Yizhong Street
2. Take bus No. 151 to Taichung High-Speed Rail Station and Chaoma
3. Take 151 to Qiuhonggu and transfer to Bus No. 5 and 33 to and from Fengjia business district
4. Take Bus No. 151 to Taichung High-Speed Rail Station and transfer to Bus No. 156 to reach Taichung Airpo
5. Take Bus No. 151 to Taichung High-Speed Rail Station, and then to Zuoying High-Speed Rail Station, then take the Kaohsiung MRT to Kaohsiung Airport
6. Take bus No. 151 to Taichung High-Speed Rail Station, and then to Taoyuan High-Speed Rail Station, then take the Taoyuan Airport MRT or take the bus to Taoyuan Airport

You can also find Uber or a taxi, which can take you to any place you want, but it’s a bit pricey.