**4. Conclusions**

In this paper, the effects of carbon content on the characteristics, microstructure, hardness, and properties of the bionic unit were studied, and the response of the base material, with different compositions, to laser bionic treatment was obtained. The conclusions are as follows:


**Author Contributions:** G.C. Study design, Data collection, Data analysis, Writing; T.Z. Literature search. H.Z. Study design; P.Z. Study design, Literature Search; S.M. Data analysis; B.Z. Literature search; S.W.: Data analysis. All authors have read and agreed to the published version of the manuscript.

**Funding:** This work was supported by Project 985-High Performance Materials of Jilin University, Project 985-Bionic Engineering Science and Technology Innovation, and the double first-class project by Jilin Province and Jilin University (SXGJXX2017-14), Natural Science Foundation of Liaoning Province (No. 20170540421) and National Natural Science Foundation of China (U1601203).

**Conflicts of Interest:** It is submitted to be considered for publication as an "Original research work" in your journal. This paper is new. Neither the entire paper nor any part of its content has been published or has been accepted elsewhere. It is not being submitted to any other journal. And there is no conflict of interest in this article.
