Unfortunately, this book is not included in the Complete Works of Marx and Engels.

Chinese version: The Complete Works of Marx and Engels (Volume 19), Beijing: People's Publishing House, 1963.

This article is what Marx thought when he wrote Das Kapital in his later years.

Review of Political Economy, 20 13, No.3, paper.

"Is it a double contradiction or a historical occurrence? -and comment on the "dual labor theory of value of entity and form", mainly citing. The conclusion is that the practical proposition of Marx's labor theory of value dispels all kinds of formalism disputes and reduces the logical disputes in the theoretical field to historical understanding in the practical field.

In this famous document, Marx actually thinks that starting from historical commodities is in line with the basic requirements of history book work. So, he stressed:

All this is "nonsense". Deprimeabord [first of all] I don't start from the concept, so I don't start from the concept of value, so there is no need to "separate" it. My starting point is the simplest social form of labor products in modern society, which is "commodity".