The second method is to build up a character using one of three systems: a combination of the radicals under the four-and three-digit index system of Chinese characters; using phonetics such as national symbols or romanization; and a combination of these two.
第二類是拼字法，包括字形的拼字：有字根拼字法、四角號碼檢字法、三角號碼檢字法等；字音的拼字：有注音符號選字法、羅馬拼音法等；和字形音混合的拼字：有四角號碼加註音符號等。把一個字按照部首、偏旁、編碼或注音符號，拆成幾個單位，依次打入，再在電腦中組合印出來。