My suggestion is change TYN to a transferable airport.
Firstly, TYN transfer 7.9M pax last year. It is a hub for Hainan Airlines and China Eastern Airlines.
Secondly, TYN is the capital of the province and it is located at the center of Shanxi Province. travelers from small airports of Datong, Yuncheng and Changzhi fly to Taiyuan to travel to other cities, such as HKG, MFM, ICN.
That is my suggestion.