"Always, always will save Wei Ying," he whispers, fierce and not a little desperate. He failed Wei Ying once. It will not happen again. "Lan Zhan and Wei Ying are family, forever."

He runs his fingers down Wei Ying's face, stroking back and forth along his cheekbone as he works up his nerve. He can do better than humming for him.

"Wén dí sheng dú chóu chàng," he starts, voice soft and rough as he sings as quietly as he can.