  Here is an example that to claim a package for $50 value and ship it by UPS to the USA, the tariff is to be
   (China post at moment does not go to the USA)

   Total Due (USD): $33.30

   Import Charges
   Government Charges: $17.30
   Brokerage Charges: $16.00

   By using UPS or Fedex agent in China, to reduce the cost a lot, but still much more expensive than China post.

   We will cover the difference by UPS and China post for our individual customers who order our professional instruments but our customers will pay for tariff before delivery to your door to the US Customs.