You don't have anything to worry about. Look at all the thousands to tens of thousands of US citizens who enter and leave China every day. You aren't important enough to get caught up in something like this. If you were important enough to be a target, you'd know it. I'm talking about very high profile CEOs of multinational corporations (Tim Cook, etc.). Even Elon Musk went to China recently to announce that Tesla was opening a new factory in Shanghai and he didn't have any problems getting out.