Why are the file names of dependent packages in node_modules underlined?

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this issue does not affect the running of the project. From a clone project on github, install the dependency package with npm I and check back that all dependency package file names have an underscore, but not with the command (in this case, the angular,ng new command).
what is the reason for this? -sharp-sharp-sharp problem description

Jul.18,2021

because you installed it with cnpm

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