I lived in China for a year after college, and that was basically fine since I was already pretty knowledgeable about the country and I went into it expecting to be off balance and that there would be a lot of new things. What was a surprise was the culture shock when I came back to the US. I don’t think that the jet lag helped, but I remember feeling really really out of sorts for about a week and just generally in a bit of shock about how different life was here having largely not been exposed to it for a year.