If you don't buy gold when you go to a gold shop, you can ask the store to pack your fishing line for free. Some gold shops will provide services such as rope weaving and bead threading. You can ask whether the store can provide this service for free. If you get a positive answer, you can ask the store to help pack the fishing line. Of course, the specific situation needs to be negotiated with the store, because different stores may have different service policies.