国内外学者对“双证书”制度的内涵、演变过程、意义、现状等进行了理论与实证方面的一定研究,但相较于国外的研究成果,我国虽已取得一定成绩,却仍旧良莠不齐,相关的实证研究还有待于进一步展开,因此仍需树立问题意识,就此展开研究。 Domestic and foreign scholars have done some theoretical and empirical studies on the connotation, evolution, significance and current status of the “double certificate” system. However, compared with the overseas research results, although some achievements have been made in our country, , The relevant empirical research has yet to be further developed. Therefore, it is still necessary to establish a sense of problem and start research on this issue.