Meng Yao misses Lan Xichen.
The flowers are in bloom in the Wen clan's garden. Lan Xichen could tell him which they were and recite some ancient poem about their blossoming that was also a compliment to Meng Yao's beauty and grace. In an ordinary relationship, Meng Yao would have been panicking if that happened, because he knew no poem to respond with, and everyone in the conversation would know it, and in fact probably would have specifically recited the poem in order to humiliate him with his inability to respond. But Lan Xichen is incapable of humiliating anyone. In his soul, there is only kindness.
Kindness is lacking in Nightless City.
The man before him is screaming and crying and begging for mercy. It's pathetic. Most of his body is intact. This isn't even one of the Jin that Meng Yao wanted to get his revenge on.
He casually breaks the man's finger, because he's in a bad mood, and the man's embarrassing noises are making it worse. "The Nie," he says casually, "have the face to wait until I've pulled out my more... special equipment... before they begin to beg."
As far as Lan Xichen is concerned, Meng Yao is an agent on the inside of the Wen clan, smuggling out information in order to help the Sunshot campaign. This is about 70% true. Maybe 60%, a man does have to watch out for his own interests, no matter how lovely Lan Xichen's smile is. And Xichen would hardly thank him if Sunshot lost and Meng Yao lost his position in the Wen court, now would he? In that situation, Meng Yao will be well-placed to ensure Xichen's safety and that of his silent little brother. It is only practical.
As far as Wen Ruohan is concerned, Meng Yao is his pet torturer of vicious creativity and unquestionable loyalty. This is true except for the last two words. Meng Yao is loyal to his mother, his father, Lan Xichen and, last and least, Meng Yao, and Wen Ruohan has done nothing to make the list.
Meng Yao is about to order the man to be dragged away so that he can have some quiet to hear himself think, when a hole opens in the floor and he is somewhere else.