Circle matrix is the algebraic description of all the resource circles in a directed graph, and equivalence reciprocally to that one of complementary set and T-characteristic vector.

This article first gives a detailed and complete description of Baoting's life and circle of friends, with the purpose to present a full Baoting objectively.

In the last decade of the 20th century, a group of beautiful women in literary circle in China deduce writing with a focus on the description of "body".