S2·E11 A Sad Parting Under Moonlight

Xie Lian gets angry with Hua Cheng for revealing the truth about the Golden Feast Massacre to Lang Qianqiu. But Hua Cheng tells him plainly that Xie Lian did nothing wrong. When he realizes that Hua Cheng trusts him absolutely, and is the one person to see through to the truth of the matter, he says aloud that he wonders if they've met somewhere before...