What are the gardening techniques of China classical gardens and Huangjiayuan forests?

In China gardens, the dignity of royal status is unshakable, and it can be said that it is overbearing in gardening techniques. Therefore, in the garden, it is manifested as incisive display and infinite pursuit. On the site selection of geomantic omen, the royal gardens in China occupy all the geomantic treasures, such as chengde mountain resort, water from the northeast, and stagnant water from the southeast, which flows to the southeast. The mountain in the northwest is the representative of Kunlun, the symbol of Xuanwu, and the water is Qinglong. The park is surrounded by mountains in the east, south, west and north, and the pattern of imitating geomantic omen is stacked. There are mountains in front and mountains behind. Zuo Fu is in the east and Youbi is in the west. The surrounding mountains are low-lying basins. So the water in the saltworks is a pool, like Suzaku. In the landscape pattern, the China Royal Garden adopted the mountain landscape style. It is also the moral concept of China people to give priority to mountains, supplemented by water, and pay attention to the combination of wisdom and benevolence. So there must be heaped mountains in the garden. The mountain is high, with the main building on the mountain as the visual center and the island in the water as the composition center, and the two hearts are integrated. In terms of axis, symmetry and center, the royal garden is firmly on the road of axis and symmetry. For example, the Summer Palace, from the Beigongmen in the back of the mountain to the Buddha Pavilion in the center of the scenic spot, and even the Phoenix Pier in Kunming Lake, is an obvious axis. At the same time, the axis and symmetry are the imperial garden behind Kunning Palace, Cining Palace Garden and Ningshou Palace Garden. In terms of landscape separation and enclosure, the royal gardens in China adopt the form of solid walls and high walls. For example, the gardens in Beijing Imperial City are surrounded by high walls, and so is chengde mountain resort. Frames, antithesis and ellipsis are widely used in China Royal Gardens. Frames are generally realized through window frames: antithesis is realized through the separation of mountains and rivers; Scenery leakage is generally realized through cloisters or verandahs. On the road, most of the royal gardens in China are inlaid with bricks, tiles, stones and other materials. Artificial ceramic tiles are the main ones, supplemented by natural rocks. Adopt the method of composition. In plant planting, the consumption is relatively low, and the green coverage rate is also relatively low, mainly to show the natural effect artificially. In terms of plant species, four-season plants and flowering plants are the best. For example, three friends in cold years and four gentlemen in flowers all have the same preference for Zhi Tao in spring, lotus flowers in summer, maple trees in autumn and pine trees in winter, which shows the Confucian doctrine of the mean. In plant pruning, the beauty of natural form is always higher than everything in architecture, which is manifested as follows: the first is the type, with palaces as the main part and pavilions as the auxiliary part, and religious buildings in the royal gardens of China account for a large part. This is related to the royal family's pursuit of longevity. Secondly, the architectural layout is mainly symmetrical with the regular central axis. Third, the number of buildings is dense. The building density is relatively high. Fourth, the building is relatively large. Fifth, most bridges are stone arch bridges. Looking at the above characteristics, it shows that the gardening technology of royal gardens in China is quite profound, which can be said to be the crystallization of the wisdom of our people for several years. The Royal Gardens in China initiated the discipline of landscape architecture, which made the gardens in China become classical gardens.