Masozi can follow clear instructions even when he's terrified that he'll do the wrong thing in some opaque confusing way and get murdered by powerful people! He drinks the tea, even though his hands seem to be shaking, which he hadn't noticed before.
He's surprised that it's sweet. It reminds him of the candy that Nie Huaisang shared with him, three days and a lifetime ago.
...Nie Huaisang is probably going to die. Wen Ning is probably going to die. Masozi has no way of DOING anything about that, anymore. It would be stupid of these people to try to rescue the children in a school in another world.
He's - mostly not processing the fact that this is another world. Everything feel distant and floaty and half-unreal again, and most of all it feels inevitable. Like gravity, how Wei Wuxian explained it to him; like he's falling and falling and falling, but never landing, just falling in circles, on a track he no longer has any power to affect.
He wonders, vaguely, if New York and Shanghai will end up at war after all. Maybe not - maybe now that he's gone, there's nothing left to fight over - but maybe New York will be scared about him having disappeared, maybe they'll think Lan Xichen did some sort of spell to hide him, maybe - no, he has no way of knowing, speculating is pointless - but it's going to happen, without there being anything he can do about it, and that too feels as inexorable as gravity...