In reply to that, Jiang Cheng lifts his head and looks questioningly at Lan Wangji. What he means to imply is - the Jins are richer and can happily afford a bride price that could represent Sizhui's worth, and Jin Ling is the nearest thing Jin Guangyao has to an heir. So it would make sense for him to be the groom in the situation, but really Jiang Cheng doesn't mind.

Unfortunately, he's still mad at Lan Wangji so it looks a bit like an accusing glare, as if he thinks being a bride is beneath his nephew.

(Jin Ling, for his part, isn't entirely sure if it makes a difference, but he glances at Sizhui to see if he cares.)