September news of Dong Fang web: Mr.zhaozhizhong is a inventor of hand calculation and brain calculation that guide the blind person to count. The method of hand calculation means:use the five finger of left hand as unit、ten 、100、1000、10,000 digits and in the each finger joints determined stripes representde by the median of nine also with right hand .Use finger to count,we can quickly to calculate the correct answer. Zhaozhizhong is a retired teacher who was a vice president of Shanxi southeastern school.He has researched fast calculation over the years and his invention has gotten patent.