travelling to china.

Hi, I would like to ask what kind of processing should i do, I'm working here in saudi and planning to go for a visit, i am a filipino.

My chinese National friend wants me to visit them before i go back, thats why she wants me to go to directly from saudi, and she is planning to send me an invitation letter.

so, is that possilbe to apply an L type? we are just friends not even a relatives.

what should i do.

thanks.