普通人洗手就是用水冲，顶多擦点肥皂，挤点洗手液，而李启章等同学则发明了一套“空气洗手装置 ” 。
Normally, people wash hands by flushing hands with water, with a little soap and sanitizer at most; however, Li Qizhang and his classmates invented a set of “equipment to wash hands with air”.