"I saw her wearing your mask. It's your treasure. You wouldn't have given it to a regular girl." —Gong Huanyu
Episode 2, “Gong Ziyu Rescued the Brides”
From the outset Weishan is connected to Ziyu's mother. When he was a child his mother gave him a mask to hide his face whenever he cries, so as to hide his weaknesses, and now as an adult he carries it around on his belt, still uses it to hide his tears. In their first meaningful interaction, Ziyu lends Weishan his mask to hide her from patrolling Gong residence guards. (This is one of my favorite dynamics between them, how he lends or gives Weishan things that were gifted to him from his family—the cloak his older brother gives him to guard against the cold, the fox fur ornament his father leaves him, the saber Young Master Hua promises him. Each gift is a smaller act of the larger shape of their relationship—him inviting Weishan into his family. Even before Weishan states that she is a Gong, Ziyu has plied her with Gong family artifacts he holds dear.) In their first interactions Ziyu is sincere while Weishan is fooling him, and I love the irony of him giving a mask to someone who operates in stealth with a hidden identity—and how through his sincerity she eventually lifts her metaphorical mask with him.