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Mete Han was one of the leading rulers of the Xiongnu Empire, one of the first major Turkic political organizations established in Central Asia. Known in Chinese sources as “Mo-tun” or “Mao-tun,” Mete ascended the Xiongnu throne in 209 BCE and strengthened central authority through a series of internal and external reforms. The decimal military system, unification of tribes, and the first diplomatic contacts with China all emerged during this period. The practices implemented under Mete Han’s ru

Strobogrammatic numbers are defined as numbers that appear identical when rotated 180°. This property is related to the rotational symmetry of the digits. Valid Digits In the decimal system, only certain digits possess strobogrammatic properties: 0 → 0 1 → 1 8 → 8 6 ↔ 9 Other digits do not form valid numbers when rotated. Therefore, strobogrammatic numbers can only be constructed using these digits. Structure and Rules Single-digit strobogrammatic numbers: 0, 1 and 8. In multi-digit numbers, onl