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What is the nine-bond formula?

Formula: A gull B waist C Wang Yang D meaning E well pay (F).

Formula: eng skill (g) pride (h) love (i), An J concave K love L, Miancai (Min) nest (uo).

Formula: Wen (un) halo (ün)P, Q ball (qiu), ten thousand yuan R, wong tear (S), about T, (U), branch V plus silt (Pinyin silt), frog W, coconut fork (X), foreign English Y, er Z.

Historical background:

Pinyin nine-key typing keys become nine numeric keyboards. A full-key keyboard becomes the keyboard of a computer. Pinyin Nine Keys and English Nine Keys are keys used for typing, and they become numeric keyboards. They are mobile phone typing methods without touch screens and with real keys, which are suitable for people who used to mobile phones before.

All keys, like the keyboard of a computer, are suitable for people who use the computer for a long time. Pinyin full-key typing accuracy is high, but the keys are too small, so 9 keys sometimes need to find the words you need.