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2-3years. For my case, I applied in April of 2002. If no interview is required, you can expect to recieve your visa in 2 years. If interview is required, you can expect to recieve your visa in 3 years. If background checks are required, you case will delayed indefinitely.
No.
USD400+USD715(Refundable Landing Fee)
90% if your background is not sensitive. I mean that your major is not military related, your working experience is not governmental in China, etc.
No.