the instruction on b/l filling是什么意思

"The instruction on B/L filling" refers to the guidelines or directives on how to fill out a Bill of Lading (B/L). A B/L is a legal document issued by a carrier to a shipper, acknowledging the receipt of goods and specifying the terms and conditions of transportation.

In the given context, when you send the number of the demand and the agent's coordinates, you also provide instructions on how to fill out the B/L. These instructions may include information such as the correct format of the B/L, the necessary details to include, and any specific requirements or customs regulations that need to be followed while filling it out.