sorry ,I can only type in English in this PC.

          I think it is not hard to study  tensor "opertion" and know about

tensor form if you observe the rules and beautiful regulations of tensor.

In fact, it is especially easy to have a geometric picture when you understand

classical mechanics or electromagnetics.

        Of course,maybe it is a good way to at home in tensor analysis,but it

takes very much time. Maybe it is also a very diffcult mission for students

major in mathematics, and  most contents are useless for students major in

Physics.

      Even when one want to study the junior mathematics of Einstein's general

relativity.All you have to do is just familiar with the meanings of covariance

and contraviriance vectors and their relations,and their covariant derivative,

and the meanins of metric and Christoffel symbols,the meanins of geodesic lines

and geodesic equation, Riemann-Christoffel and Ricci curvature tensor,

and Bianch identity.








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