一小引中国古时有龙马负河图与乌龟背浴书两个神话的流传;这当然是一种迷信了。据河图的图形计有30个黑圈分为2,4,6,8,10五个偶数,并有25个白圈分为1,3,5,7,9五个奇数。至于洛书的图形计有20个黑圈分为2,4,6,8四个偶数,而也有25个白圈分为1,3,5,7,9五个奇数。作者偶将河图的黑圈数目30与白圈的数目25首尾相接合,则得到一个3O25;并将洛书中的黑圈数目20与 A small quotation of ancient China had the spread of two myths: the dragon horse map and the turtle back bath book; this is certainly a superstition. According to the river map graph, there are 30 black circles divided into 2, 4, 6, 8, 10 five even numbers, and 25 white circles are divided into 1, 3, 5, 7, 9 five odd numbers. As for the Luoshu graph, there are 20 black circles divided into 2, 4, 6, and 8 four even numbers, and there are 25 white circles divided into 1, 3, 5, 7 and 9 five odd numbers. The author occasionally joins the number of dark circles 30 in the river map with the number 25 in the white circle 25 to get a 3O25; and the number of black circles in the Luoshu is 20 and