Rob Kardashian -- In & Out of Blac Chyna's Gate (PHOTOS)

Rob Kardashian was tooling around Tarzana Tuesday, driving into Blac Chyna's gated community where he's been living for nearly a week.

It's the first shot we've seen of Rob in a while, certainly since he jettisoned Khloe's pad and made the trip to Chyna.

As we reported, aside from the obvious, Chyna's been helping him work out and eat better.

Maybe it's just us, but his face looks a little thinner.

And for what it's worth -- Rob continues to add fuel to the fire -- posting a pic of BC's mug with a "key" emoji to his Instagram page.