C470 Han Academy of Science Came to Visit

It's a quadrangle!

A few days later, Qin Guan returned from the 4430 factory to the capital. He finally arrived at his new office.

The courtyard house, also known as the courtyard house, was a traditional courtyard building in Han Country. It was built on four sides of the courtyard and surrounded the courtyard in the middle. It was also known as the courtyard house.

Of course