Okay the cat returns but jiang cheng and dogs... Jiang cheng, on his way back from school, sees a puppy about to be hit by a truck. He dives into the road, grabs the dog and rolls away just in time. Except it turns out the dog he saved was Lan Wangji, prince of the dog kingdom.

Lan Qiren, regent of the dog kingdom and LWJ's uncle, is filled with gratitude. JC has already been on their radar as a human who is often kind to dogs. As a reward for saving LWJ's life, JC can have his hand in marriage. JC is not thrilled. He doesn't want to marry a dog.

He loves dogs, but not like that! But while he's freaking out about it, a sleek grey dog tells him to go look for Zewu-Jun, who might be able to help him. JC is about to run off when he stops. "Wait, what should I tell him?"
"Tell him Mulberry sent you," the dog says.

A horn sounds behind him and JC glances away for a second. When he looks back, the grey dog is gone. Right. Time to find this Zewu-Jun. When he arrives at the cabin where Mulberry told him to go, he finds a handsome humanoid dog in crisp robes, an understanding look on his face.

He's also like two feet tall. With him is a large, very muscular pitbull named Chifeng-Zun and a small basset hound named Lianfang-Zun. But before the three can explain to JC how he can get out of this situation, a number of dogs wearing robes with the king's sun insignia appear.

I'm too lazy to redo all this, so let's please retcon this thread and pretend that the dog prince is Wen Xu and Wen Ruohan is the dog king.