Pi in China圆周率在中国Pi,the ratio of the circumference of a circle to its diameter, is a very im-portant constant in mathematics. The calculation of pi was an important criterion showing the development level of a nation’s mathematics in ancie...
Ling Qu灵渠Ling Qu(Ling Canal),also called Dou River or Xing’an Canal,was an ancient canal that connected the Yangtze River system and Pearl River system. ling Qu,located in the current Xing’an County in Southwest China’s Guan-gxi Zhuang Aut...