Regarding Employment visa in beijing

You should prepare all required documents and then submit it to the nearest CVASC branch (New Delhi, Mombai and Kolkata). It usually takes four working days. It costs Rs4961 (visa cost and application fee). The required documents are:
1. Work permit, invitation letter or letter of confirmation from duly authorized Chinese unit
2. a personal introduction letter, including where you are going, who invites you, the inviter's address and contact information.
3. other documents required by the embassy.