“Do you know how?” Wang Yizhou asks, but it’s all a light tease, and he’s already taking his hand away, as if in expectation.

“Nope!” says Ji Li, confident. Then, in a move that he will recognise, in hindsight, to be the start of the complete undoing of his whole night, he adds, “But I’ll learn. Really quick.” He fishes out his phone from the pocket of his shorts, and holds it up, almost conspiratorial. “Bet I’ll have it down in one video. I’m very resourceful like that.”