When I went to Guangqi Park at eleventh hour, I found a memorial hall of Xu Guangqi. Although it was not a big one, it was well-decorated and air-conditioned, so I wandered in it alone. Inside, Xu Guangqi's relevant experiences and materials are quite complete. Classics, charts, models, sound and light are displayed in all directions. The statue of Xu Guangqi in the courtyard was bathed in the brilliant sunshine and looked at me quietly.