hongkong to mainland, how can I get a visa to mainland PRC

If you go to mainland PRC for tourism purpose, you should apply for a tourist L type in your home country. The first step is to prepare the relevant materials including the competed application form affixed with a passport-sized color photo, your passport and copy of its data page, an invitation letter from your friend in PRC (you can ask your friend to issue it to you), and proof your financial support (if it’s the first time you apply). Next, submit your application to the consulate general of PRC to apply for it.