Who means who.

Liu Bei's allusions of three visits to Mao Lu:

I didn't see Zhuge Liang twice before, and the third time happened to be taking a nap. A few hours later, Zhuge Liang woke up and said, "Who slept first?" I've known all my life. The thatched cottage had a good spring sleep, but it was late outside the window. "This poem is profound, interesting, savoring and beautiful! After Zhuge Liang finished writing the poem, the first sentence he asked was: "Are there any vulgar guests coming? "