You know, I feel like Shen Wei was maybe actually sort of relieved that everybody finally knew? He must have known there was no way he could keep the secret indefinitely, and not having to struggle to keep his two identities separate around everyone must have been a somewhat welcome change, even if it wasn't what he'd actually wanted. He seems a bit relieved about Zhao Yunlan finally finding out his identity, and given that he knows he can trust the SID members not to make trouble for him, it seems like he'd have similar feelings about them knowing, too.

I really wish we'd seen Chu Shuzhi's reaction, though. I'd love to know whether he already subconsciously suspected it, or if he was completely shocked. (I tend to imagine it like trobadora said -- Chu Shuzhi being momentarily shocked and then like... yeah, okay, a lot of things suddenly make sense, how did I not figure this out before...)