In this universe, TGCF is played by actors bc I said so :)

The whole cast was getting ready for filming, getting their make-up retouched, practicing their lines ect ect.

San Lang and Xie Lian were filming the episode they met, on the hay (don't come after me for not remembering).

When the camera showed Xie lian, San Lang kept making faces and blaming him when he broke character

"Yeah Xie Lian, stop breaking character and focus Xie lian"

He pretended as if it wasn't his doing