C470 The Han Academy of Sciences 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.

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