Clark wasn't too surprised when Lois tried to resist what he had done, even after they were both well into the air. Most people wouldn't have tried it with him out of fear that they might get dropped, but Lois didn't seem to think that was much of a concern. Of course, that was probably because she wasn't thinking about much of anything right now. Her irritation with him had likely taken over, which - as much as Clark hated to admit it - was a good thing. If she was letting herself get mad, she was letting herself feel. It was one step away from being that robotic, cold version of Lois that Clark had spent all day worrying over and another step toward the Lois that was going to face what she was trying so desperately hard to run from.
At her struggle, Clark tightened his grip on her again. It didn't bother him, personally, but if Lois took one swipe at him with too much force, she'd end up with a shattered hand. And if she didn't end up hurting herself, there was still the off chance that she'd somehow wriggle her way out of his grip and tumble into a free fall. If she fell, Clark knew that he could catch her, but the process wouldn't be a very fun one for Lois, who was already going through enough.
"No," Clark told her firmly, "we're not going back. You're not going back. Not today." Not if he had anything to say about it. And right now, what with him being the one flying them around, he did and there was absolutely nothing that Lois could do about it. "I'm sorry. I'll say it a million times over, but I'm not going to let you work yourself to death when we both know that it's the last thing that you need to be doing. You're coming with me." He'd take her to the Fortress of Solitude. It was a quiet, private place where Lois could take some time to herself. No one would bother her. Work wouldn't get in the way. It was where she needed to be now, just as Clark knew that the very same place was where he needed to be when he was in need of some serious alone time.
The Fortress was a lot closer than China. Clark knew that they would be there long before Lois was anywhere near finished fighting him on this.