四期三期必开一期是什么

简介：As a senior official of the Ming Dynasty, although Yuan Jixian did not know much about the three lines of defense deployed by the imperial court to prevent the invaders from entering the fortress, he had heard about it, and with his experience and knowledge, he knew the importance of Hejian Mansion. Naturally, he also knew about sex, so he nodded: Yes, Hejian Mansion cannot tolerate any mistakes.