These Pre-market Approval process usually need a few weeks, months, or even years, So you need to arrange in advance before shipping.

Otherwise, without such Approval, even if the goods have arrived at the China Customs, they will not be cleared normally, and the goods will be detained in the port till get such approval, or even be returned, causing you huge losses.

If use incorrect HS codes for China Customs declaration, will resulting in the Customs Clearance failed, Cause additional Clearance time, more storage costs, substantial fines , administrative penalties, even face Civil or Criminal charges;