草字头是“草”字的顶上部分，是汉字的一个部首，如今的写法是一横两竖。根据如今的规定，它的笔顺是先写一横，然后写两竖。
The head of the word “Cao” is the top part of the character “Cao”, which is a radical of the Chinese character. Nowadays, it is written horizontally and vertically. According to current regulations, its stroke order is to write one horizontal line first, and then two vertical lines.
雨部，为汉字索引中的部首之一，康熙字典214个部首中的第一百七十三个（八划的则为第七个）。就繁体和简体中文中，雨部归于八划部首。雨部只以上方为部字。且无其他部首可用者将部首归为雨部。雨字头常作形符，用雨作形符的字多与下雨或天空有关。如雪、零、霄等。
Yubu is one of the radicals in the Chinese character index, 173 of the 214 radicals in the Kangxi Dictionary (the seventh with eight strokes). As far as Traditional and Simplified Chinese are concerned, Yubu belongs to the eight-stroke radical. Rain Department only uses the upper part as the word. If there are no other radicals available, the radical will be classified as Yubu. The head of the word rain is often used as a symbol, and the words using rain as a symbol are mostly related to rain or the sky. Such as snow, zero, Xiao, etc.
Radical of Rain, 雨字头, yǔ zì tóu。Snowing, 下雪, xià xuě。Thunder, 打雷, dǎ léi。Field, 田, tián。Heavy fog, 大雾, dà wù。Service, 服务, fú wù。Task, 任务, rèn wù。Mold, 发霉, fā méi。Each, 每, měi。
火部为汉字索引中的部首之一，康熙字典214个部首中的第八十六个（四划的则为第二十六个）。就繁体和简体中文中，火部归于四划部首。火部通常是从上、下、左方均可为部字。当上方为部字时，会以火为部字；下方为部字时，会以火或灬作为部字；左方为部字时，必以火为部字。火部包含通常含义与“火”有关的汉字。
Radical of Fire, 火字旁, huǒ zì páng。Light, flame and heat from the burning of objects, 物体燃烧所发的光、焰和热, wù tǐ rán shāo suǒ fā de guāng, yàn hé rè。
例字：Extinguish, 熄灭, xī miè。Electric light, 电灯, diàn dēng。Disaster, 灾难, zāi nàn。Fire, 火灾, huǒ zāi。Stir fry, 炒菜, chǎo cài。Smoke, 冒烟, mào yān。Because, 因, yīn。Burn, 燃烧, rán shāo。Dry, 干燥, gān zào。Goods, 商品, shāng pǐn。Wood, 木, mù。