What are the traditional techniques of rockery?

Rockpiling techniques (or techniques) of rockeries are often divided into two schools, namely, the Northern School centered on Beijing and the Jiangnan School centered on Taihu Lake Basin. In fact, since ancient times, many rockeries in Beijing have been "built by Wu" (Zhu Zunyi's sentence), mostly influenced by craftsmen in the mountains in the south of the Yangtze River. For example, Li Yu, Zhang Lian and Zhang Ran all belonged to the south of the Yangtze River in the early Qing Dynasty, leaving behind rockery works in Kyoto. In particular, Zhang Lian and Zhang Ran lived in the capital and were good at rockery, which was famous for traveling between officials and ministers. In the early Qing Dynasty, Wang Shizhen's Juyi Record said: "The great scholar Wanping the maharaja, recruited the great scholar, and really decided Liang Gong. The younger brother of the great scholar Juan Lai visited the righteous courtyard, and the beautiful water and stones were natural. The Huating (now Songjiang, Shanghai) was also made by Zhang Ran. Tao An, whose father is Nanyuan, takes a window as a rockery, and welcomes autumn, Beiyuan, Dachi and Yellow Crane as paintings. The twists and turns are ups and downs, the management is bleak, and the chemical industry is wonderful. Nanyuan died, but she died with her. Today, Yingtai, Yuquan and Changchun Garden all have arrangements. " Since then, Beijingers have specially broken rockeries, called "Zhang Shanzi", which has been handed down from generation to generation as a "cross tactic" of safety, association, receiving, fighting, carrying, spelling, hanging, sword, card and hanging. There is also a "30-character formula" of "picking up buckets, hanging swords, nailing tenons, caulking pads, and converting pressure". There are "nine strokes" in Jiangnan, such as folding, standing, padding, spelling, picking, pressing, hooking, hanging and supporting. In fact, its modelling technique is roughly the same, which is some basic forms and operation modelling technique of rockery in the process of piling up, as well as the combination of rocks and rocks.