

I am foreigner and now working in Korea.
Recently, I was accepted as professor at a Chinese institute. Now I need to send several documents to China for work permit, then I will use it for Z Visa application. However, I still have several issues need your helps.
1) Do I need to notarize all required documents, then to authenticate in Korean Foreign Ministry Consular, and then to authenticate in Chinese Consulate? Will this apply for all documents (including official documents such as Ph.D degree issued by Korean University, Criminal record issued by Korean Police department, Physical Exam Record issued by Korean hospital)?
2) Can I authenticate documents in Chinese consulate at Busan? After that, I just only can submit all documents for Z type at CVASC, not in Chinese consulate, can't I?
3) Do I need to reserve a schedule before visiting any Chinese consulate or CVASC?