Newly Designed Diagram of the Surveying Step Cart

The ingenuity of Yuanhui's Yuanhui is the style name of Cheng Dawei (1533–1606), the author of the Suanfa Tongzong, the most influential mathematical text of the Ming Dynasty. measurement method

The subtle precision of the numbers passed down through the lineage

To find the area in mu from the total accumulated steps, divide by twenty-four original: 二四歸除 (ershi guichu). In this context, "twenty-four" refers to the constant 240, as 240 square steps equal one mu..
To find the total steps from the area in mu, multiply by twenty-four.
Currently, only Xiuning Xiuning County in Anhui Province was a famous center for commercial printing and mathematical scholarship during the Ming and Qing dynasties. has established this new cart-based method.

Diagram of the Three-in-One Cart Design

Two identical rods, each one foot and three inches long.
The thickness is nine-tenths of an inch square.
Grooves four inches long are cut into all four sides
A width of three and a half tenths of an inch is allowed for the rotation

Take the two aforementioned rods and join them to form a cross shape.
In the center, carve a square hole of four-tenths of an inch; create an opening around the four sides to be secured with a bolt and lock.

Place the cross assembly into this casing to complete the assembly of the entire cart; the full diagram is shown above.