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1. The Dinglan Ruler, also known as the “Divine Ruler,” is said to have originated from the story of Ding Lan, a filial son from the Han Dynasty. Having lost his mother at a young age, Ding Lan carved a wooden statue of her by hand as an expression of his longing when he grew up, which is how the ruler came to be named.

2. The Dinglan Ruler was primarily used for measuring ritual objects such as shrines, carved wooden figures, and ancestral tablets. Later, its use gradually expanded to include the measurement of dimensions for ancestral sites (such as tombs and ancestral halls).

3. The Dinglan Ruler is typically 1 chi 2 cun 8 fen in length, which is approximately 38.78 centimeters. The ruler is divided into ten sections, each representing different auspicious or inauspicious meanings, and is further subdivided into four smaller sections.

4. When using the Dinglan Ruler, people generally avoid inauspicious divisions such as “Harm, Suffering, Death, and Loss,” and instead select auspicious divisions such as “Ding, Prosperity, Righteousness, Official Rank, Revival, and Wealth,” in the hope of attracting good fortune and warding off misfortune.

5. Note: The conversion results provided by this tool are for reference only; please use a physical ruler as the standard in actual practice.