Dear Sir,
I am Suresh Sheoran from India . I have traveled many times on business visa to PRC china as I do import CCTV parts from Shenzhen.
I want to alpply for Business visa with multiple entry for one year but my supplier is unble to understand about the document requirement as stated below:

(1) The applicant has a visa notification issued by the authorized Chinese unit, which specifies the validity, number of entries and duration of stay for the visa application; or
Please advise from where to get above certificate.
Regards,
Suresh