Firstly, I would clear that the work should be applied from the China Embassy or cosulate in Indonesia.
1. You should prepare valid & original passport with at least one blank visa page and valid for at least 6 months beyond the date of application, a ful-filled visa application form attached with a light blue or white background passport photo, A Work Permit for Aliens issued by the Ministry of Labor and Social Security of China or a Foreign Expert's License issued by the Chinese Foreign Expert Bureau(for frofessional experts), and a visa notification letter or fax issued by authorized Chinese governmental or relavant agencies, visa notification issued by the authorized Chinese unit, A Physical Examination Certificate (you may have to get the form from the China embassy or cosulate).
3. You must come to the visa office of the Chinese Embassy or Consulate -General in the consular jurisdiction in which you live to submit the application; or If you cannot come in person, you may entrust someone else or a travel/visa agent to come to the visa office of the Chinese Embassy or Consulate -General in the consular jurisdiction in which you live for the application process.