Introduction to the sister buildings: It is divided into two buildings, the south and the north. The south building was built by Wu Qingtong, the garrison envoy of Nanyang, and the north building was built by Yuan Ying, the grandnephew of Yuan Shikai and the commander of the new 12th division of the Kuomintang. Due to the form and structure of the two buildings, They are the same, so they are called "sister buildings". It is also said that the sister building was named because the wives of Yuan Ying and Wu Qingtong were sisters.