<p class="ql-block"> Today I will talk about the four great inventions of China.Paper making ，gunpowder , printing and compass.These four inventions have been recognized as catalysts for great civilizations.And these four important discovers and invitations were from China.</p><p class="ql-block"> 今天我将给大家介绍中国的四大发明。分别是造纸术、火药、印刷术和指南针。四大发明催生了伟大的文明。这四大发明都来自于中国。</p> Paper <p class="ql-block"> Before paper, Chinese characters were inscribed unto animal bones.The innovation of paper came during the Han ynasty.Cai Lun used bark,rags and fishnets that widely spread throughout china.Paper enabled the creation of lightweight books.</p><p class="ql-block"> 在纸出现以前，汉字都是刻在动物的骨头上。造纸术出现于汉代。蔡伦用常见的树皮，破布，鱼网来造纸。人们用纸做成了很轻的书。</p> Printing <p class="ql-block"> Printing techniques would come during the Song ynasty and by Bi Sheng .Bi Sheng had invented the first movable type printing press.Chinese characters will be put nto clay types and assembled to print a page.</p><p class="ql-block"> 印刷术来自于宋代的毕昇。毕昇发明了第一台活字印刷机。汉字被制成粘土字体并组合成一页。</p> Compass <p class="ql-block"> The first compass was invented during the Han ynasty.There is a lodestone like a spoon shape, which always point to south.</p><p class="ql-block"> 指南针源于汉朝。里面有一个像勺子的磁石始终指向南方。</p> Gunpower <p class="ql-block"> It was composed of charcoal,saltpeter and sulfur.The military uesd them to develop weapons,such as the fire arrow.These four inventions in science and technology are the famous four .</p><p class="ql-block"> 火药是由木炭、硝石和硫磺组成。军人用火药制作武器，比如火箭头。这四项科技发明，就是著名的四大发明。</p>