What is the best route from Xi 'an to Swansea, England? Going abroad for the first time, how to change planes?

From Xi 'an to Beijing or Shanghai, that's for sure, there's nothing to say. The question is where to fly from Beijing. First, if you fly to Heathrow Airport, you usually take Coach, which is a long-distance bus, when you arrive at the airport, because it is more troublesome to find a train station in London if you want to take a train. It takes about 4 hours and 20 minutes from Heathrow Airport to Cardiff via Coach, and more than 6 hours to Swansea. Advantages: All airlines flying to the UK have flights to Heathrow Airport, air tickets are easy to buy, and you don't need to change planes on the way to the UK, so you can fly directly and smoothly, and there is a great choice of which city to take in China. Disadvantages: After arriving in England, it will take more than six hours by bus. Don't underestimate these six hours, it will make you extremely tired. Taking a bus is even more tiring than flying, which means you have flown halfway across Britain. Second, the second way is to fly to Cardiff, because Cardiff is only two hours' drive from Swansea, and get off the plane and take a bus to the train station in downtown Cardiff (because the central bus station is next to the train station), so you can choose to go to Swansea by train or bus. Advantages: After getting off the plane, you can reach your destination in two hours by car or less than two hours by train. There are many choices. Taking the train will be much more comfortable than taking the bus, and getting off the plane will be much easier. Disadvantages: The flight from China to Cardiff needs a connecting flight. There will be flights between KLM and Air France, which means you have to transfer in Amsterdam or Paris (this is not entirely a disadvantage, because some people want to rest at the airport, and the airport conditions are good, so they can walk or buy some duty-free goods). After getting off the plane from Cardiff, you need to take a bus to Cardiff city center. It may be inconvenient if you have too much luggage. In short, this is my personal experience, and the advantages and disadvantages are written out. You choose.