The manual is a bonded certificate issued by the customs. Because the imported materials and parts have to be processed at home, and the finished products have to be sent abroad (except the unsuitable materials), it is more complicated to collect them first, so it is bonded by hand. Now is the transition period from paper manual to electronic manual and electronic account book, and paper manual will quit the historical stage in the near future. At the time of inspection, for the imported goods that need to provide the manual for statutory inspection, because they will still leave the country, commodity inspection is generally not carried out (of course, no inspection fee is charged), which is also the reason why enterprises are willing to provide the manual when applying for inspection.

As for the samples you want to see, you will know at work.