It is recommended to use large format digital back. Even if there are no conditions, a high-pixel camera like D3X needs at least 24 million pixels (stitching shooting).
The focal length of the selected lens should be longer, preferably not less than 85 mm, because too short a focal length will lead to perspective distortion, and the artistic effect and uniformity of illumination should be considered in light distribution.
It is also a headache to correct the color in the later stage and restore the primary colors of calligraphy and painting works on the computer. We'll talk about it then.
If the requirements are not high, ordinary SLR sets and tripods can also be used (such as D90 or 50D), and it can be done within 10000.