what type of visa will i need to marry in china

Hello I. Have a girlfreind in PRC and we plan to get married in her city in PRC and she wants Me to stay in her house rather than booking a hotel but I don't understand the visa rules for this to be able to take place as I was told before that I would only need a tourist L type but I have read that my lady would have to send me an invataton letter is this true?