1. The conversion rate between nanometers (nm) and meters (m) is 1 nm equals 10 to the power of negative nine meters (1nm = 1e-9m).
2. Nanometers (nm) are a unit of length, also known as nanometers, defined as one-billionth of a meter.
3. The size of a nanometer is comparable to the size of four atoms, smaller than that of bacteria.
4. Meters (m) are the basic unit of length in the International System of Units (SI), with 1 meter equal to 1000 millimeters (mm).
5. One millimeter is equal to 1000 micrometers (μm), and 1 micrometer is equal to 1000 nanometers (nm).
6. Therefore, 1 meter is equal to one billion nanometers (1m = 1,000,000,000nm).
7. In traditional Chinese length units, there are units like li, zhang, chi, and cun, with complex conversion relationships.
8. For example, 1 zhang is equal to 10 chi, 1 chi is equal to 10 cun, and 1 cun is equal to 10 fen. These units were commonly used in ancient times.
9. In modern life, kilometers (km) and meters (m) are common length units, with 1 kilometer equal to 1000 meters.
10. The conversion rate between meters and centimeters is 1 meter equals 100 centimeters, and 1 centimeter equals 10 millimeters.
11. Additionally, 1 li is equal to 150 zhang, or 500 meters, and 2 li is equal to 1 kilometer, which is 1000 meters. Please note that the data and descriptions in the above items are based on reference materials, but there may be different conversion methods and precision requirements in actual applications.

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