C1204 Implicit Difference

I couldn't help but turn my head to look back. Damn, I saw Guan Yunfei and Xie Fei walking in while talking and laughing.

The Old Supervisor came home for the weekend.

Old Guan and his Senior Sister came to eat seafood together.

When we saw them, they saw us.

Seeing us, the old man paused for a moment, then came over to us with a big smile on his face.

When she saw us