Is it possile 24-Hour Visa-Free Transit at Yantai Airport(YNT)?

Lee, the main and the most important detail is if your entire transit time in mainland China, starting from your scheduled arrival into Kunming, until your scheduled departure from Yantai is shorter than 24 hours. If this is the case, you are definitely eligible for 24 hour visa free transit and you do not need any kind of visa. The formalities that you have to accomplish are:

- You will print out your flight tickets and your hotel booking confirmation for an overnight in Yantai and have those documents at hand.
- During your check-in in Chiang Mai you will just declare that you are traveling to Seoul via China using 24 hour visa free transit and here you will present them your flight tickets.
- Upon arrival in Kunming the first detail you will do is to approach the transit counter where you will apply for a temporary entry permit by presenting those printouts. This permit/application is free of charge. After a short check, you will be allowed to cross the immigration because your next flight is a domestic one.
- When you reach Yantai you will just exit the airport because you will be on a domestic flight and have an overnight in the hotel.
- In the morning you will just cross the immigration and continue with your flight to Seoul.

Just one additional detail... You have mentioned Yantai Laishan airport, but I would say that you will use Yantai Penglai that replaces Laishan years ago...