Although rockery has various changes such as peaks, ridges, caves, and valleys, the combination of mountains and rocks can be summarized into more than 10 basic forms. Teacher Zhang Weiting from Beijing, known as "Shanzi Zhang," has summarized the "Cross Code", which includes "installation, connection, connection, Dou, hanging, Yu, card, hanging," as well as "picking, floating," while in the Jiangnan area, there are nine character codes, which are "stacking, verticality, padding, splicing, picking, pressing, hooking, hanging, and supporting". Compared to others, some of them have common characters, while others have different titles with the same content, indicating that the craftsmen from the north and south are in a continuous line.
There is no significant hierarchical distinction in the rockery production technique, but for the convenience of analysis and certain structural requirements, its composition is divided into three parts according to its location: the base, middle layer, and top layer.
The pillar stone is also known as the top layer, commonly known as the "pull bottom". It is necessary to stand on the foundation and have a stable bottom. The pillar stone is the "foundation of stacking stones", and all vertical and horizontal play depends on the placement of the pillar stone.
Selection of materials: Choose large or medium-sized stones more often. The body shape does not need to be too beautiful, but it needs to be tight, hard, and pressure resistant.
Attention: Flexible use - It is necessary to use stones sensitively, striving to mix different shapes and sizes to prevent the same size of stones from being connected; Leveling - Place the largest and flat surface of the mountain stone facing upwards, level it with your eyes, and then place a stone under it to stabilize it; Misalignment - The arrangement of the stones must be staggered, with varying heights, and the heads and tails connected in different shapes; Orientation - It is necessary for Anji to consider the orientation of the rockery, with each stone facing the side where the visitor's view converges (i.e. the main facade) with its varied concavity and convexity; Intermittent - The pillar stone should prevent building into a wall foundation, and there should be gaps and gaps, as well as gaps and gaps; And rely on - group Anshi, the interface is tight, and the overlap is stable.
The middle layer is located above the bottom stone and below the top layer. This part of the rockery has the largest volume and is the most appreciative part, with a wide range of materials and a variety of shapes. The shape of the mountain is mostly displayed from this layer.
Located on the cornerstone, it is the main component of the stacked mountain, with rich and varied artistic techniques. Below, we will analyze it from a structural perspective.
Materials - Most stone shaped and beautiful materials are used here, but it is important to use solid stones at special stress points to avoid danger.
Attention: Stable - the same as Anji, so that the stone is placed smoothly with the large side facing upwards; Coherence - No matter how intricate the stacked stones are, they must be connected and connected, making the upper, lower, left, and right coherent into one; Avoiding competition - that is, to avoid revealing a narrow stone surface, because it can no longer stack stones and is very ugly, commonly known as "flashing competition revealing the tail"; Biaan - Every time a stone is placed, it is necessary to consider its potential for further development.