I would like to stay 2 months more in china .

After you current student X type expires, you can apply for a 30-day tourist L type. And if you want to stay for 2 months, you can apply for an extension of the tourist L type 7 days earlier before it expires.

hi thank you for your answers .
do you know the prices of the tourist L type?
or what kind of documents I have to bring to the office

It cost CNY 168.
The required documents include the application form, a passport-style photo, your passport, accommodation Registration Form, accommodation arrangement and airline ticket as well as other materials required by the consular officers.

Ok I understand but if o want an extension of my tourist L type .
will I have to change my plane ticket date 2 times ? for exemple I'm changing the date for the end of June . then when I when I apply for an extension I will have to chandeliers it again or I can directly change my flight to end of July when I apply for the tourist L type the first time ?

If you want to extend it, I’m afraid you need to change your plane ticket and you can try to change it to end of July.
Or if you can get an invitation from your friend in PRC, the air ticket may not be required. In this case, you don’t need to worry about that.

Thank you for your answers I'm supposed to stay at my chinese friend home . so if she can write a letter for me I wouldn't need to change my plan ticket multiple times??

Yes, she can write the invitation letter to you, and then you don't need to change your tickets multiple times.

Thank you very much it helps a lot .

Hi have one last question . I don't need to go to Hong Kong for the applications right ?

Yes, you don't have to go to HK for the application and extension.