The Qiang people living in the northwest plateau of Sichuan created a special spatial form of watchtowers under their historical background, so this place enjoys the reputation of "the country of thousands of watchtowers". Watchtowers are called "Qionglong" in Qiang language. The "Book of the Later Han Dynasty: Biography of the Southwestern Yi" records that the Qiang people "live in the mountains, build rooms with stones, and the height of some is more than ten feet." In the past, the main functions of the Qiang watchtowers were to be used for observation, defense, and information transmission, and they also symbolized identity and status; now they are mainly used for living and storage. The appearance of the Qiang watchtowers is four-cornered, six-cornered, eight-cornered and multi-cornered. The bottom floor of each watchtower is completely closed, and a small door is opened on the second floor. From the second floor onwards, countless rectangular windows with large inside and small outside are opened around for ventilation, observation and shooting. The floors are connected by a single wooden ladder that can be pulled out at any time. The construction materials of the Qiang watchtowers in Wenchuan are mainly stone and yellow mud. The existing watchtowers are mainly stone watchtowers. Before construction, the "Shibi" needs to select the site, make the method, and design it according to the terrain. Before construction, the craftsmen will use a hammer to process the stone pieces, and then according to the shape and size of the tower, they will first dig the corresponding foundation pit at the construction site until the hard rock is dug, and then use a shovel to apply the mixed yellow mud on the beaten stone pieces, and then stack and press them layer by layer to make the mud and stone glued. The stone wall is gradually thinned from bottom to top. The inner side of the wall is still vertical to the ground, and the outer side is slightly inclined, with the center of gravity inward, forming a centripetal force, making the tower firm and stable. Each layer is equipped with a wooden beam with a diameter of about 20 cm, and wooden boards are laid on it, and the layers are the same. The yellow mud tower is rammed, and there are only 3 in Buwa Qiang Village, Wenchuan County (listed as a national key cultural relic protection unit in 2006), and its construction method is the same as that of the stone tower. The tools used to build the Qiang tower are very simple, mainly hammers and shovels. Whether the towers are made of stone or yellow mud, they all have one thing in common, that is, during the entire construction process, no drawings, no hanging lines, and no support columns are used. The entire process is based on the experience of the craftsmen, which fully demonstrates the Qiang people's superb construction technology. The Qiang towers, which have been built for hundreds and thousands of years and do not contain a single bit of reinforced concrete, have experienced the 7.4-magnitude Diexi earthquake in 1933 and the 8.0-magnitude Wenchuan earthquake in 2008. Although they have been damaged to varying degrees, most of them are solid and firm, proving the scientific nature of their construction. (No pictures yet, welcome to provide.) (No pictures yet, welcome to provide.)