I'm Indonesian and stay in daejeon.I wanna go to guangzhou for view days,what should i prepare to apply for a visa?

I don't know what kind of document that I should prepare. Because all my document is in Indonesia. Is it enough just to bring picture, passport, Indonesian identity card, and Korean alien card to the embassy? And how long should i wait for it? Should i go there by myself? Because i have to go to the university on weekdays