Hello @wenli_sun .
Note that Hunter NePa was the initial idea, several years Ago.
Community has moved to a new parser - Boda.
You can download the free parser (open source) here in Community, currently it is used by more than 50k users.
But also keep in mind that we are about to launch the new tool, Hunter CE (Community Edition) that will include Boda parser and much more. You can see more details here: Hunter CE - Before we begin