Core fields：
Date, importers, suppliers, country of origin, destination, notify party, bill of lading number
Key Column：
Date, product description, address of the bill of lading number, importers, importers, suppliers, supplier address, notify party, carrier and country of origin, destination, port of shipment, arrived at the port of destination
Searchable fields：
The product description, the bill of lading number, importer, supplier, port of shipment, the port of destination