Chyna -- I Wanna Do 'Porn For a Living'

Chyna's new XXX video will not be her last .... the former wrestler tells TMZ she wants to keep the ball rolling and make porn into her full time career.

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Chyna has already approached Vivid Entertainment honcho Steven Hirsch and informed him that she's interested in a multi-tape deal ... and she's ready to start crankin' em out ASAP.

"I would definitely like to do more, " Chyna says ... "It gives me motivation again. I want to be better and happier than ever ... that's the point, right?"