The Hanjiang River, which meanders between the Qinling Mountains and Bashan Mountains, originates in ningqiang county, Shaanxi Province, flows through more than 30 cities and counties such as Hanzhong, Xixiang, Ankang, Xunyang, Yanxian, Danjiangkou, Xiangfan and Xiantao in Qin and Hubei provinces, and joins the Yangtze River in Wuhan, with a drainage area of 48000km2. Many valleys in the upper reaches of the Han River are deep A, while those in the middle and lower reaches are wide A, forming many small "dams" in the mountains. Around the confluence of these "dams" and water, along the river bend and on the river bed, many floodplains and terraces are formed by alluvial materials in branch ditches under the action of river water transportation and precipitation. These messy deposits constitute a rich storage area of Hanjiang stone.
Hanjiang River is the largest tributary of the Yangtze River, with a total length of 1577 km. The resources of ornamental stones in Hanjiang River are very rich, especially from Hanzhong to danjiangkou city. There are countless pebble beaches along the way, and it is not surprising that some can reach hundreds of acres or even hundreds of acres. Hanjiang stone is a pebble of river origin, which can be divided into siliceous rocks, sedimentary metamorphic rocks, quartzite, limestone and paleontological fossils. From the aesthetic point of view, there are pictographic stones, pattern stones, writing stones, paleontological fossils and so on. For example, according to the different types of stones, it can be divided into color rhyme stone, peeled stone, glazed sapphire, black jade, thousand-eyed stone, rolled stone, wax stone, agate, Hanjiang red stone, snowflake stone, marmatite and so on. And paleontological fossils and mineral crystals.