园林专业必看——拙政园艺术特色分析（下） - 知乎 (zhihu.com)

From the perspective of protecting garden heritage, the systematic investigation and recording of Chinese classical garden heritage using modern surveying and mapping methods began in the 1930s. Liu Dunzhen, Tong Jun, Chen Congzhou, and other experts from the older generation of ancient architecture and gardens have conducted a systematic investigation and mapping of the remains of classical gardens, leaving behind many surveying and mapping drawings.

Since the founding of the China, with the strengthening of the concept of cultural relics protection, the national cultural relics department has gradually begun to investigate and count the heritage of classical gardens, and has established systematic garden records and archives; At the same time, universities in China that specialize in architecture and landscape architecture have offered courses related to ancient architecture and landscape architecture, and have organized surveying and mapping internships in accordance with the traditional architectural education tradition of the college. Its scope covers most regions of the country and has formed an increasing number of achievements.