Introduction to Jiang Zehan’s former residence: Mr. Jiang Zehan is an internationally renowned mathematician, educator, topologist, and one of the founders of the Chinese Mathematical Society. This residence is an Hui-style building of the Qing Dynasty, with two front and back entrances and a total of 14 upper and lower halls, wing rooms and side rooms, which are well preserved. To this day, the good news that Jiang Zehan graduated from Nankai University and studied abroad can still be seen on the wall.