Develop the Courtyard First, Don't Waste It

(Siheyuan, systematic text, multiple female protagonists) Qi'an, the calf and horse king of the 21st century, woke up and found that he had traveled to the world of a courtyard. After merging his memories, he found that it was now 51 years. The good news is that Qin Huairu has not married Jia Dongxu yet. The bad news is that his legs are actually a little lame.