what's your purpose for coming to China? In another word, what type of visa do you want to apply? Different requiremnets for different type of visa

It's for travelling visa.

The requirements are:
a. Your valid & actual passport. The passport must have at least six (6) months validity left before expiration and at least one blank page left in it.
b.One completed Visa Application Form with one additional passport photo (black & white or color is acceptable).
c. Round-trip air ticket and hotel reservation.

Do I need to photostat the passport? and also where can I get the visa application form?
Thank you.

You must come to the visa office of the Embassy or Consulate -General where you reside to submit the application; or if you cannot come personally, you may send someone else or a travel/visa agent to come to the visa office of the Embassy or Consulate-General where you reside for application processes.
Mail applications are not acceptable and will be refused.
You can download the application form from this website:
https://www.travelchinaguide.com/embassy/visa.htm

SO, my Chinese visa application is in the third country, right?
I am Indonesian but I study here, what application I must fill in?

Thank you.

Ms.Sherli, the Visa Application Form of P.R.China is same to every applicant, no matter you apply for China visa in your own country or in a third country. you can download the form from this website https://www.travelchinaguide.com/embassy/pdf/visa-application.pdf

Ok...Thank you..
and one more question How long it takes to make the visa based on my condition?
Because my flight on the mid of September?

A normal visa procedure takes 4 working days.