Introduction to cast iron: The columns of the corridor of Chen's Academy and the railings of the platform fence are all decorated with cast iron. Folk artists skillfully embedded the cast iron railings into the stone carving frame of the fence, using iron and The color contrast between the stones and the transparent three-dimensional shape of the iron cast give the platform fence a unique decorative effect like a Chinese painting of fighting squares, which has become a major feature of the architectural decorative art of Chen's Academy. Among them, the "Qilin Jade Book Phoenix Picture" ", "The House is Full of Gold and Jade", "Three Yangs Kaitai", etc. are all rare masterpieces. These iron-cast decorative techniques absorb Western architectural decoration techniques and combine them with traditional Chinese cultural theme elements to complement each other. They are a unique cultural phenomenon in Guangzhou, the forefront of cultural exchanges between the East and the West.