Are Cao Xueqin and Cao Xueqin the same person?

I saw this joke from Miao Sheng's cross talk "Know Everything". The version of the crosstalk contest only mentioned Cao Xueqin. We should have a look at the early version of the cross talk "Table Pingshan Haijing", which mentioned three people: clay figurine Zhang and He. The beauty of this joke lies in the analogy between the first two and the third. You can search online for clay figurine Zhang and Feng Gray, who are a group of people who pinch clay figurines and build buildings, so this joke lies in that clay figurine Zhang is a clay figurine, so for example, Cao Xueqin asked Cao Xueqin to sell red celery in the snow, but many people may not know the story of clay figurine Zhang and Feng Gray, so they can't understand this joke ~